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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi List,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Since I’m working on a software implementation of the Moog Sequencer 960<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>And that I don’t own any, I had to ask detailed questions about its detailed inner behaviours..<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>So I asked the forum for some help.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’ve been fortunate to get lots of help from two forum users<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave Brown</span></b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> and <b>Scott Loiselle</b>.<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave</span></b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> has a strong knowledge about the Moog 960 circuitry workings<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Since he repaired these machines since a while.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>and <b>Scott</b> owns 2 x <b><u>Q960 sequencer clones</u></b> from <a href="http://www.synthesizers.com">www.synthesizers.com</a> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>which precisely emulate the original Moog 960.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>They both agreed to share their replies with this forum so…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>for those of you who would have some interest in the ‘hidden’ workings<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>of the 960 here is a list of some specific questions/answers.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This is a long one !!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jean-Pierre<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal align=center style='text-align:center'><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>[sdiy] Moog sequencer 960 analysis.. further DETAILED questions..<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal align=center style='text-align:center'><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>Answers from Dave Brown & Scott Loiselle<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave Brown:<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>I have only repaired 960s so these answers are from examination of the schematics and what scope images I saved. Errors in my analysis are certainly possible.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#1<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Suppose you have the following setup on the Moog 960</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The internal low freq oscillator is stopped,<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>All the 9 columns are at rotary switch 'normal' position (NORMAL for column 9 is SKIP)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>but the 4th which is at 'skip'<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>What happens if I push the 4rth column SET pushbutton ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Will it select the 4rth or the 5th column ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And if the 4th column is selected anyway<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>and I start the oscillator, will it skip this 4rth column<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>at the very start and go to the next 'normal' column<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>or execute the 4rth anyway ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The set button clears all stages and then sets the appropriate stage. The stage 4 flip flop has both the clear and set asserted, but the one shot pulse for clear is shorter so that stage is reset. The output is inverted so stage 4 is set. If that stage is set to skip, there are no inputs to the NOR gate. This is RTL logic so an unconnected input is a low. On the next clock stage 4 will then be reset. The “all stages off” circuitry will detect no stages are set and will set stage 1. The clock will continue running from stage 1. But this raises the issue of what if stage 1 is set to skip? I think if you manually set stage 1 and set it to skip, the other stages remain off when you start the oscillator and it simply stays on stage 1. This would be worth verifying.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#2<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>I suppose that (when reached) any 'stop' selected columns will stop the internal oscillator</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>and turn its 'oscillator ON' light off ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The same way as if I connect a column's OUT jack<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>to the oscillator 'OSC OFF' jack ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>Stop simply isolates a stage (1 to 8) by feeding the output of the flip flop back to the input. <u>Only stage 9 out does turn off the oscillator</u> but for stages 1 to 8 the oscillator stays enabled but the stage stops advancing. Hold is a more accurate term.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>Any pulse to the oscillator stop jack will disable the internal oscillator.<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#3<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>It seems that the possible CV voltages on each row</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>are 0-2vdc (x1), 0-4vdc (x2), 0-8vdc (x4) ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>Regarding question#3<o:p></o:p></span></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>It seems that the possible CV voltages on each row<o:p></o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>are 0-2vdc (x1), 0-4vdc (x2), 0-8vdc (x4) ?<o:p></o:p></span></i></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>In the Moog system 55 service manual, in the 960 sequencer schematic,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>Looking at the ‘transistorized’ OPAMP made of Q31,32,37,38<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>It looks like a non–inverting amplifier that can have 3 different gains:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>X1: ((R162+R167)/R64)+1 => (3,55k+10k/1k)+1 => <b>gain of 14,55</b><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>X2: ((R163+R167)/R64)+1 => (16,7k+10k/1k)+1 => <b>gain of 27,7</b><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>X4: ((R164+R167)/R64)+1 => (43,3k+10k/1k)+1 => <b>gain of 54,3</b><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>The columns CV switching PNP’s 2N3702 (ex:Q1)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>Each column supplies around +12v to each 5kB pots trios.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>So 0-12v divided by the summer’s separate resistors (100k and 1.3k (R165))<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>Gives around 12v X (1.3/(100 + 1.3)) = 0.12v X 0,012 = 0,153v max on each pot at the OPAMP input.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>This maximum pot voltage is amplified and gives 3 possible amplified voltages:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>X1: 0,153v x 14,55 = <b>2,23v max</b><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>X2: 0,153v x 27,7 = <b>4,24v max</b><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>X4: 0,153v x 54,3 = <b>8,31v max<o:p></o:p></b></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'>The specification for the 960 is 0-2V, 0-4V, and 0-8V.</span><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#4<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>When the oscillator is ON,</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The main oscillator output jack is always giving a +5vpeak 90% duty cycle pulse right ? (for ADSR reason ??)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>But each individual column out jacks give a positive pulse which duration is the actual column time ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The clock is trimmed for a 90% duty cycle. My oscilloscope image shows a 4V amplitude.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The output stage gates are driven from RTL so are 3.6V amplitude and are high for the duration of the stage time.<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#5<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The internal oscillator:</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>What are the actual min/max frequencies on each possible 6 positions ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The oscillator is a unijunction driven from a constant current source that has been calibrated to 1V/Oct. The timing capacitors are of the following values so the ranges will differ by their multiple.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>1: 27 uF<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>2: 5.6 uF<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>3: 1.5 uF<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>4: 0.39 uF<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>5: 0.04 (hard to read and maybe wrong)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>6: 0.022 uF.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>If 27 uF was x frequency then 0.022 would be 1350x, so a range of over 10 octaves.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The capacitors would have some tolerance, the largest likely +/-20%. The ratio of each stage to the next is close to 4 so these seem to be 2 octave increments. However, #5 looks wrong.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>If you assume the coarse control had a range of 2 octaves, then you would want the step ratios to be multiples of 4:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>1, 4, 16, 64, 256, 1024. The capacitor ratios are just a bit more (except for #5):<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>1, 4.8, 18, 69, 675, 1350 so all relatively close for standard capacitor values except that 675. If I chose #5 to be 256 exactly, the capacitor would be 0.1. It clearly is a 0.0? which looks like a 4 but could be a 9 which would be close to the right value, but not a standard value.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>I only recorded measurements from one of the 960s I rebuilt which had a maximum of 400 Hz at #6 and maximum frequency control.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The CV input is 100K which is trimmed to 1V/Oct. The frequency control is 6V at 180K which is a bit over 3 octaves, so it looks like the 6 positions switch is setup for a 2 octave increment and the control is +/- 1.5 octaves. I did not check the values of the timing capacitors on the unit I repaired.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>Assuming a 3 octave coarse frequency control, the minimum frequency for #6 would be 100 Hz, and #1 would make the lowest frequency 0.1 Hz. The specification for the 960 is 0.1 Hz to 500 Hz.<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#6<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>While the internal oscillator is running,</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Pushing the 'shift' pushbutton would 'add' pulses<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>on the running pulse stream to all the shift registers ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The output of the external shift input and the shift pushbutton one shot is or’d with the oscillator one shot. Both would produce a clock so would advance a stage. Note that if these events happen while the oscillator one shot is high, the output of the or is still high so no extra advance. The manual shift button one shot is longer, but would only advance the stage if the clock one shot was low. I don’t know the one shot high time since it is an RC into a RTL gate, but the RC time constant is only 40 uS. I would say most of the time you would get an advance, but not guaranteed depending on the relationship to the clock high.<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#7<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>While a sequence is running on all the 8 columns</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>and the sequence has reached column#7<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>what happens if I push the column#3 SET button ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Will this disturb the sequence and bring it back to column#3 <o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>then resume all the normal sequence ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The set button clears the flip flops and sets that stage and that usually takes precedence over the clock. The datasheet doesn’t actually specific set and clear inputs with respect to the clock but a look at the internal schematics for the 778 shows that it is the same as being clocked. So yes, irrespective of the oscillator, the set will change to that stage and then advance from there.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#8<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>A:</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>If the sequencer oscillator is stopped (OSC-OFF pushbutton) at sequence#3 (column#3 light is lit)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And this sequence is in STOP position,<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Then I click the OSC-ON pushbutton to restart the oscillator<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Should I then hear the oscillator pulses (ADSR) an hear this<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Column’s 3 potentiometer pitches forever?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>B:<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And the same question but for sequence#1 at STOP ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>(Column’s 1 potentiometer pitches forever?)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>C:<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And the same question but for sequence#9 at STOP ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>(Column’s 8 potentiometer pitches forever?)<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The oscillator output is directly from the oscillator, so whenever it is on the output is valid.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>The oscillator output goes through a one-shot to shape the clock and that simply toggles all the flip/flops. As long as at least one stage is on their D inputs define what happens. Stop simply feeds the output of the flip flop back to the input so that is really a hold.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>So, #1, yes it simply stays stopped on stage 3.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>#2, yes, it stays stopped on stage 1.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>#3, stage 9 is a valid stage, just like the others. There is simply no CV output from it, so yes, it stays stopped on stage 9.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>A commentary on stage 9. Stage 8 is fed back to stage 1 on a skip. The schematics shows stage 9 skip/normal but the panel and wiring is skip/stop so an error there. Stop is just a hold on stage 9. <u>However, stage 9 out does turn off the oscillator</u>. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'>Note that if the sequencer is running, and you select STOP on stage 9, the oscillator does stop.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='mso-element:para-border-div;border:none;border-bottom:dotted windowtext 3.0pt;padding:0cm 0cm 1.0pt 0cm'><p class=MsoNormal style='border:none;padding:0cm'><b><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p></div><p class=MsoNormal><b><span lang=EN-US style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Scott Loiselle:<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>Hi, I can answer most of the questions but ONLY about the </span><span style='font-family:"Calibri","sans-serif"'><a href="http://synthesizers.com/"><span lang=EN-CA>Synthesizers.com</span></a></span><span lang=EN-CA style='font-family:"Calibri","sans-serif"'> 960 clone. I know that in general practice, using one is very much like using a Moog but I do not know about certain specific behaviors - they might be different between a Moog and the </span><span style='font-family:"Calibri","sans-serif"'><a href="http://synthesizers.com/"><span lang=EN-CA>Synthesizers.com</span></a></span><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>, or for that matter, the COTK clone, the Mos-Lab clones or any other clones.. That said, please see below.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#1<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Suppose you have the following setup on the Moog 960</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#1F497D'> </span></b><b><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The internal low freq oscillator is stopped,<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>All the 9 columns are at rotary switch 'normal' position<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>but the 4th which is at 'skip'<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>What happens if I push the 4rth column SET pushbutton ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Will it select the 4rth or the 5th column ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>It selects Stage 4</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And if the 4th column is selected anyway<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>and I start the oscillator, will it skip this 4rth column<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>at the very start and go to the next 'normal' column<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>or execute the 4rth anyway ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>If a stage is in skip but you manually select it and then start the internal oscillator, it immediately goes to stage 1 and plays all stages except that it skips stage-4. If you manually select a stage that is in “normal” and then start the oscillator, it plays from that stage forward. The thing to remember is that regardless of whether or not the internal VCO is running, for whatever given stage is active, the 3 row outputs will be outputting whatever voltage the pots for the three rows of that particular stage are set to (unless it is in stage 9 in which case all three row outputs send out 0 volts).</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#2<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>I suppose that (when reached) any 'stop' selected columns will stop the internal oscillator</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>and turn its 'oscillator ON' light off ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>No, if the sequencer is playing and you set a stage to stop, the sequencer stops at that stage with that stage light lit and the internal oscillator light still lit. If you then turn the mode switch from stop to normal, it immediately begins playing again, from the stage it had been stopped at. But if you turn the mode switch from stop to either skip or the unmarked reset available on the </span><span style='font-family:"Calibri","sans-serif"'><a href="http://synthesizers.com/"><span lang=EN-CA>Synthesizers.com</span></a></span><span lang=EN-CA style='font-family:"Calibri","sans-serif"'> units, it immediately goes to stage 1 one and starts playing again from there.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The same way as if I connect a column's OUT jack<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>to the oscillator 'OSC OFF' jack ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>This is correct.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#3<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>It seems that the possible CV voltages on each row</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>are 0-2vdc (x1), 0-4vdc (x2), 0-8vdc (x4) ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>This is correct.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#4<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>When the oscillator is ON,</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The main oscillator output jack is always giving a +5vpeak 90% duty cycle pulse right ? (for ADSR reason ??)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>But each individual column out jacks give a positive pulse which duration is the actual column time ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>This is correct.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#5<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>The internal oscillator:</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>What are the actual min/max frequencies on each possible 6 positions ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>I do not know. The dotcom data sheet says the internal VCO goes from .1Hz to 2kHz+ but I do not know if that’s correct. </span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#6<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>While the internal oscillator is running,</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Pushing the 'shift' pushbutton would 'add' pulses<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>on the running pulse stream to all the shift registers ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>This is correct. Also, if feeding in an internal gate/trigger pulse into the SHIFT input, it sums the internal clock along with any external signal.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#7<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>While a sequence is running on all the 8 columns</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>and the sequence has reached column#7<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>what happens if I push the column#3 SET button ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Will this disturb the sequence and bring it back to column#3<span class=apple-converted-space> </span><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>then resume all the normal sequence ?<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>This is correct.</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><br></span><b><span lang=EN-CA style='font-size:16.0pt;font-family:"Calibri","sans-serif";color:#0070C0'>question#8<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>A:</span></b><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#0070C0'><o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>If the sequencer oscillator is stopped (OSC-OFF pushbutton) at sequence#3 (column#3 light is lit)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And this sequence is in STOP position,<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Then I click the OSC-ON pushbutton to restart the oscillator<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Should I then hear the oscillator pulses (ADSR) an hear this<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>Column’s 3 potentiometer pitches forever?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>B:<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And the same question but for sequence#1 at STOP ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>(Column’s 1 potentiometer pitches forever?)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>C:<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>And the same question but for sequence#9 at STOP ?<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-family:"Calibri","sans-serif";color:#0070C0'>(Column’s 8 potentiometer pitches forever?)<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>It is the same answer for all three. If</span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>- the internal VCO is not running<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>- a stage is manually selected<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>- that stage mode is set to “STOP”<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>during this time, at all times, the row output will send out whatever voltage that the stage is set at, and the gate output of that stage will be held high.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>When you then push START for the internal VCO, nothing changes except that “Oscillator On” lamp lights up. If you then reset the stage mode switch to normal (or skip, for stage-9), the 960 immediately starts playing at the <i>next</i> stage. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>So if you are:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>- at stage 3 with the internal VCO not running<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>- stage 3 mode switch is set to STOP<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>the stage 3 gate output will be high, putting out 5 volts and each row output will be putting out whatever voltage is set by each of the row pots for that stage.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>- you then press START on the internal VCO<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>nothing happens or changes except that the “oscillator on” lamp lights up.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>If you then turn the stage 3 mode switch from STOP to NORMAL, it immediately goes to stage-4 and plays all stages sequentially from there. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri","sans-serif"'>One thing to make clear: when stage-9 is active, all row outputs send out 0 volts, there are no voltage pots for stage-9, it is simply a stage for the sequencer to come to rest at, so that <b>when you push play, it starts correctly on stage 1.</b><o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;color:#0070C0'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div></body></html>