Korg Poly800/EX800 Users

That is extremely odd behavior because both DCO1 and DCO2 operate from  the same master oscillator but DCO2 has an interval and detune arrangement (parameters 31 and 32) that will offset DCO2 from DCO1. Other than that, all of the mechanics of DCO1 and DCO2 are inside of the tone generator chip - the MSM5232.
So first of all, make sure that parameters 31 and 32 are both set to zero (0) and see if the behavior is still seen.
Have you uploaded the default patches using audio "tape" load? Because sometimes bad patch data from a dead backup battery can cause unexpected effects.

/Mike

      From: "bagaeta@... [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: korgpolyex@yahoogroups.com 
 Sent: Wednesday, November 25, 2015 5:35 AM
 Subject: [korgpolyex] Poly800 DCO 1 does not play the right notes
   
    Hello, I'm a new member here, general synth geek and collector. I recently took delivery of a Poly800 but when I tried it I noticed some strange behavior, with some notes out of tune. After a bit of fiddling I think this is happening only with DCO1: when in double mode with DCO1 level turned down to 0 the notes are in tune. 

With DCO1 it looks like the DCO is not responding to notes (from the keyboard or MIDI) in the right fashion. So for example if I play C D E F it sounds kind of like C D Eb E (or something to that effect)

Any idea what could be causing this and how to fix it?

Thank you!

Bruno  #yiv3371858456 #yiv3371858456 -- #yiv3371858456ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv3371858456 #yiv3371858456ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv3371858456 #yiv3371858456ygrp-mkp #yiv3371858456hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv3371858456 #yiv3371858456ygrp-mkp #yiv3371858456ads {margin-bottom:10px;}#yiv3371858456 #yiv3371858456ygrp-mkp .yiv3371858456ad {padding:0 0;}#yiv3371858456 #yiv3371858456ygrp-mkp .yiv3371858456ad p {margin:0;}#yiv3371858456 #yiv3371858456ygrp-mkp .yiv3371858456ad a {color:#0000ff;text-decoration:none;}#yiv3371858456 #yiv3371858456ygrp-sponsor #yiv3371858456ygrp-lc {font-family:Arial;}#yiv3371858456 #yiv3371858456ygrp-sponsor #yiv3371858456ygrp-lc #yiv3371858456hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv3371858456 #yiv3371858456ygrp-sponsor #yiv3371858456ygrp-lc .yiv3371858456ad {margin-bottom:10px;padding:0 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