Re: [PolySix] Re: Key assign mode issue
2015-05-08 by Bob Grieb
Are you sure the sound of the previous note that we hear is not coming from a different voice?If the poly six does not re-assign the same voice for the same
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2015-05-08 by Bob Grieb
Are you sure the sound of the previous note that we hear is not coming from a different voice?If the poly six does not re-assign the same voice for the same
2015-05-08 by mpe1969@tpg.com.au
Thanks . It isn t a start up issue (...though it starts on the first note). I was able to see the problem on the oscilloscope (see new photo). There is an
2015-05-08 by Tubbutec
Hi, the Polysix assignes the voices in a rotary order. It always chooses the next voice. After you turn on the Polysix it needs a couple of seconds until the
2015-05-08 by Bob Grieb
The poly six may assign the same note to the same voice if it s played again after releasing the key.Lots of synths work this way. So it may be that the first
2015-05-07 by mpe1969@tpg.com.au
I just did another check. The arpeggiator is working correctly. The reason why it was jumping up an octave on oscillator 6 was because I had the add lower
2015-05-07 by Bob Grieb
When I bought my PolySix, so many keys were out that I thought I had a circuit problem. But unfortunately cleaning did not bring them back.I ended up
2015-05-07 by mpe1969@tpg.com.au
Right. So hold is working (ha). I m used to mono synths where the next key pushed changes rather than adds the next pitch - as in the unison selection on the
2015-05-06 by Bob Grieb
That s great news. Since the anti-log circuit is shared by all sixvoices, if just one osc is sharp, then you would just tune that one.As has been mentioned
2015-05-06 by Tubbutec
yes this is the whole idea with hold ... Am 06.05.2015 um 15:25 schrieb Chromatest J. Pantsmaker ... -- http://tubbutec.de https://www.facebook.com/tubbu.tec
2015-05-06 by Chromatest J. Pantsmaker
It s been a while since I ve played with my P6 (shame on me), but I m thinking that HOLD should keep playing that note until HOLD is released. I feel like
2015-05-06 by mpe1969@tpg.com.au
Good news. I replaced ic9 (added socket) and I have some action! I am now getting sounds! The oscilloscope showed more positive voltages on ic9 leg1 and when !
2015-05-05 by Bob Grieb
Your scope looks quite usable. 25 MHz should be OK for what you will find in most synths. You will get a little rounding of corners, but overall it
2015-05-05 by radek.tymecki@op.pl
Tobias, it seems my CPU from key assigner is also dead. Is there any chance to get one from You?
2015-05-05 by mpe1969@tpg.com.au
Thanks (just about to go to bed, but did another quick check). IC9 pin2 is definately showing the same as pin 1. (problem) The oscilloscope works in reverse:
2015-05-05 by Bob Grieb
IC9 pin 2 should be at 0V all the time. If you have a waveform at pin 2, I would replace IC9. Also, your photos say 0.5V/division. Are you using a
2015-05-05 by mpe1969@tpg.com.au
I have just added three more photos. Results from tonight. IC 7 and IC8 seem to be ok. (inverting voltages) Except pin 13 on ic7 voltage present butis a
2015-05-04 by rp_brennan@yahoo.com
Hey Don, thank you for taking some time to explain the functions of the MG! I know that it is beyond simple, but it was no small thing to me - I really
2015-05-04 by mpe1969@tpg.com.au
No problem, I will have another go at taking photo s tonight. (flash doesn t work on screen so will set up a small tripod. Thanks again. I can say that I was
2015-05-04 by Bob Grieb
If you post any more photos, please use more of the screen by setting the volts/div smaller,so that we can see more detail. Also, please tell us what the
2015-05-04 by Ben Stuyts
Hi, Your photos are now available in your photo album. I have photo upload set to moderated because of spammers abusing it in the past. Ben (Moderator)
2015-05-04 by kluber@hotmail.com
Hi there! I was wondering if it was possible to put a volume pot on the Sub Osc? It could be a really neat modification to do! I just remove D1 from the KLM
2015-05-04 by Bob Grieb
Actually, IC39-3 is a virtual ground node due to op amp IC19, so it should be sitting at 0V all the time. My mistake. But how about pin 7 of IC 19?
2015-05-04 by mpe1969@tpg.com.au
Thanks, I had another look tonight. I tried to upload some oscilloscope photos but they didn t seem to save to my album. IC9 has a dc around -2 to 2.5v that
2015-05-04 by <backshall1@bellsouth.net>
There are two ways to control the MG modulation amount. The MG wheel adds the LFO signal to the control voltage for the oscillator, so it varies the pitch. The
2015-05-03 by rp_brennan@yahoo.com
In other words, if I turn the MG wheel all the way down, will this shut off the LFO? Does the Frequency knob control the speed of the modulation, while the
2015-05-03 by rp_brennan@yahoo.com
Hello! I just acquired a PolySix. Been playing around with it. I feel like I m in over my head (new to synthesizers), but I know this can t be that
2015-05-03 by Bob Grieb
Hi again, Now I am thinking that the gate LED s staying on was due to hold modeand it sounds like the gates are working OK when you are in poly mode, so
2015-05-03 by mpe1969@tpg.com.au
Hi there, I ve been away for the weekend but managed to have a quick look tonight. My oscilloscope is a primitive analogue so I m a little limited. However I
2015-05-02 by Dave Garfield
Dear Bob,Oh my, NO! NOT over-posting! Rather, it means that you are our go-to source for in-depth knowledge about the quirks and shortcomings of the Korg
2015-05-02 by Bob Grieb
Does this mean I am over-posting? Maybe I need a vacation... ... From: Dave Garfield daveogarf@yahoo.com [PolySix] To:
2015-05-01 by Dave Garfield
Dear Group,My humble apologies beforehand, but: When there s something strange,In your Poly - six,Who ya gonna call? BOB GRIEBSTER! WARNING: Original song
2015-05-01 by Bob Grieb
Hi, Normally I would agree with you that not having good voltages at R152 would indicate the 4051would be bad, but if the gate LED s are not shutting off,
2015-05-01 by mpe1969@tpg.com.au
Thanks Bob. I had a look tonight. All I get on that pin is a noise looking wave. I was reading some earlier messages on this forum last night and thought I
2015-04-30 by Bob Grieb
If the oscillators are not running, then you could still get a ticking sound due to the VCA opening and closing. As I recall you have a scope,so maybe focus
2015-04-30 by mpe1969@tpg.com.au
I replaced the cpu (thanks) and now my six diodes light up when testing (super). However... I still have issues. I only get a ticking sound. My filter and
2015-04-24 by Chromatest J. Pantsmaker
Thanks for that! I just bought one. Less than $25 with free shipping from china. On Thu, Apr 23, 2015 at 11:15 PM, Roman modular@go2.pl [PolySix]
2015-04-24 by Roman
If you can spare $25, then you have a scope. Look for DSO138 on eBay. It s DIY kit, all parts included. Works good for audio frequencies. Roman Dnia 23
2015-04-23 by taylorjmandel@yahoo.com
The problem does appear on all waveforms. I will rerecord with different settings and in different octaves to help give you guys a better idea. I have some
2015-04-23 by taylorjmandel@yahoo.com
Unfortunately I don t have a scope but I will try and find those on the schematics
2015-04-23 by Bob Grieb
Also, it seems that on voice one, we hear a note that is one octavebelow the other voices. I wonder if the sub osc could be on for that one?Do you have
2015-04-23 by Florian Anwander
Hello Does the problem appear on all waveform settings at the VCO or only at a certain setting? You are playing a quite high tone. So it is difficult to judge
2015-04-23 by swamp.gigs@googlemail.com
Ah ok - try checking the 4051 on IC23. The schematics will show which pins to compare... helpful if you have a scope.
2015-04-23 by taylorjmandel@yahoo.com
Thanks for the advice. Unfortunately I already tried that (should have said that in the first post) and the problem didn t follow so it doesn t seem like the
2015-04-23 by swamp.gigs@googlemail.com
Hi, Try swapping IC32 for that voice with IC32 for another voice... These are the SSM2044 filter chips and reside near the leds for each voice. Obviously,
2015-04-23 by taylorjmandel@yahoo.com
Hello everyone. I m brand new to the forum, though I have done a little stalking in recent months, and have finally built up the courage to post a thread on
2015-04-18 by Bob Grieb
Got it. The code checks for a diode to see which synth it s running in. Guess I need to use that to change the MIDI numbers a little for the MP. I
2015-04-18 by klosmon
Well, cool. Will send $30 today. Regarding Polysix MIDI used on the Monopoly -- I ve attached other MIDI key assigner boards from the P6 to the MP; one issue
2015-04-18 by Bob Grieb
I should add that my design does not use SMT chips,to ease construction, so it is larger than a 40-pin DIP package and overhangs the socket. That s why
2015-04-18 by Bob Grieb
Hello Group, I designed a small pc bd that plugs in in place of the PolySix key assignerand adds MIDI note on and note off. It can also trigger the
2015-04-17 by Bob Grieb
Since you have a scope, you may want to check all pinsat the key assigner and let us know if you see anything interesting.Any activity on any outputs other