<div><span class="gmail_quote">On 9/15/05, <b class="gmail_sendername">Casio Rapman</b> <<a href="mailto:casiorapman@hotmail.com">casiorapman@hotmail.com</a>> wrote:</span></div>
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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Here's a question for ARP Sequencer users.<br>Is it possible to synchronize multiple ARP sequencers to the same clock and
<br>have each of them output a its own voltage controlled clocked gate 1 output<br>with its own independently varying voltage controlled pulse width (for<br>varying gate lengths)?<br>It seems to me like the sequencer providing the master clock is the only one
<br>which can have CV control of the gate width coming from this clocked gate 1<br>output.<br>Am I wrong? If I'm right, is there any way to modify an ARP sequencer to do<br>what I want?<br>Thanks!<br><br>_________________________________________________________________
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<div>Hey Casio,</div>
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<div>That's a bit of a tough one. What the ARP does is use a sawtooth VCO as its clock gen. The saw wave is fed to a comparator that creates the variable width clock pulse (a very basic PWM circuit). I think you could accomplish what you're talking about by taking the saw wave out of the master sequencer and feeding it into the PWM circuit of the second sequencer. Then you could have both sequencers driven by one clock, but with the ability to set the clock pulse width seperately for each sequencer. You'd have to add a couple of jacks to the existing sequencers (saw out, pulse comparator in), but the mods shouldn't be too difficult. Another possible solution would be to use an external saw VCO (set to low frequency operation of course) and two external PWM circuits. Then, you just feed the output of each PWM circuit into clock input of one of the sequencers.
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<div>You can find the schematics at <a href="http://www.retrosynth.com/docs/1601/">http://www.retrosynth.com/docs/1601/</a></div>
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<div>I've noted that a lot of analog sequencers don't have a variable width clock pulse. How critical is this? I've studied the ARP 1601 intending to clone it (project #10 on a list of about 40), but sadly, it's been years since I've actually used one (and then only briefly). Is this a "top-five useful feature", or is simply fiddling with envelope settings enough?
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<div>BTW, you're lucky enough to own TWO ARP sequencers? ;) Congrats!<br> </div>
<p><br clear="all">Tim (but it's on the list, really!) Servo<br>-- <br>"Imagination is more important than knowledge." - Albert Einstein </p>