Discussion about the Korg PolySix synthesizer

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 note, but always picks the next voice,then maybe the issue is with voices not turning off fast enough when you release the key?So you get the old note and the new note for a bit, then just the new note?
Maybe the sound is gated off, but the voice is still playing when it shouldn't be, then when you 
play a new note, the overall sound is gated on again, and you hear the new voice plus the old voice 
for a bit.   But this implies that you could wait longer between notes and the problem would 
go away.   You said that wasn't the case.
I think a simpler demo, with you pressing keys, and also telling us exactly what the sequence 
is, like press 1, release 1, press 2, etc.  might be more useful.  Unless the note is being re-assignedto the same voice, my theory about the capacitor voltage doesn't work.
 Also, then you look at IC31 pin 3, you are seeing the voltages for all 5 voices, plus two or threeother voltages that are used to keep the anti-log tuned correctly.  Those extra levels are normaland will not change as you play notes.
When you label your photos, please show the real vertical sensitivity, taking into account the probe.So if the scope is set to 0.1V/div but you are using a 10:1 probe, then the setting is 1V/div, not 0.1V
   Bob



   

   From: "mpe1969@tpg.com.au [PolySix]" <PolySix@yahoogroups.com>
 To: PolySix@yahoogroups.com 
 Sent: Friday, May 8, 2015 6:26 AM
 Subject: Re: [PolySix] Re: Key assign mode issue
   
    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 arrow pointing to the trouble area. When distortion occurs this voltage still has not changed from the previous note. when the voltage finally moves (usually after a few key hits) the note sounds normal. It sounds like what you are mentioning Bob. However I get the same results on c39 and ic31 pin3. I have uploaded a painful 2 minutes of audio (folder polysix demo- distorted-korg polysix.mp3). using the arp to trigger notes (you'll get an idea of the problem after about 20secs). I figured it is easier to hear than me try to describe.I'm happy to replace either or both ic's. Just thought it would be good to see what is happening.Thanks again  #yiv7294379708 -- #yiv7294379708ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv7294379708 #yiv7294379708ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv7294379708 #yiv7294379708ygrp-mkp #yiv7294379708hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv7294379708 #yiv7294379708ygrp-mkp #yiv7294379708ads {margin-bottom:10px;}#yiv7294379708 #yiv7294379708ygrp-mkp .yiv7294379708ad {padding:0 0;}#yiv7294379708 #yiv7294379708ygrp-mkp .yiv7294379708ad p {margin:0;}#yiv7294379708 #yiv7294379708ygrp-mkp .yiv7294379708ad a {color:#0000ff;text-decoration:none;}#yiv7294379708 #yiv7294379708ygrp-sponsor #yiv7294379708ygrp-lc {font-family:Arial;}#yiv7294379708 #yiv7294379708ygrp-sponsor #yiv7294379708ygrp-lc #yiv7294379708hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv7294379708 #yiv7294379708ygrp-sponsor #yiv7294379708ygrp-lc 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