Discussion about the Korg PolySix synthesizer

Anyone ever experience any slight timing issues with the polysix arpeggiator? Usually for me it only occurs when i have the arp in full range setting of 2 octaves UP/DOWN.. There is a slight hiccup after going UP, just before it begins to come DOWN. It seems like the down begins a dozen or so milliseconds late while it processes the upcoming information. The funny thing is this even happens with the ARP being triggered externally via the TRIG jack.

Is this a result of digital lag time in the microprocessor? Or is this actually something i can adjust or repair?

The arpeggiator is code inside the key assigner.   An interrupt 
signal is generated by an edge either on the remote trigger or the 
oscillator on the front panel board.   When this interrupt comes in, 
if the arpeggiator is enabled, the key assigner advances to the next note.So I think the delay when changing direction is probably in the code, 
and would be the same for internal or external trigger.
    Bob

      From: "jim@saltlands.com [PolySix]" <PolySix@yahoogroups.com>
 To: PolySix@yahoogroups.com 
 Sent: Saturday, November 15, 2014 3:12 PM
 Subject: [PolySix] Arpeggiator Timing - Slight Irregularities?
   
     Anyone ever experience any slight timing issues with the polysix arpeggiator? Usually for me it only occurs when i have the arp in full range setting of 2 octaves UP/DOWN.. There is a slight hiccup after going UP, just before it begins to come DOWN. It seems like the down begins a dozen or so milliseconds late while it processes the upcoming information. The funny thing is this even happens with the ARP being triggered externally via the TRIG jack. Is this a result of digital lag time in the microprocessor? Or is this actually something i can adjust or repair?    <!--#yiv6593630690 #yiv6593630690ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv6593630690 #yiv6593630690ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv6593630690 #yiv6593630690ygrp-mkp #yiv6593630690hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv6593630690 #yiv6593630690ygrp-mkp #yiv6593630690ads {margin-bottom:10px;}#yiv6593630690 #yiv6593630690ygrp-mkp .yiv6593630690ad {padding:0 0;}#yiv6593630690 #yiv6593630690ygrp-mkp .yiv6593630690ad p {margin:0;}#yiv6593630690 #yiv6593630690ygrp-mkp .yiv6593630690ad a {color:#0000ff;text-decoration:none;}#yiv6593630690 #yiv6593630690ygrp-sponsor #yiv6593630690ygrp-lc {font-family:Arial;}#yiv6593630690 #yiv6593630690ygrp-sponsor #yiv6593630690ygrp-lc #yiv6593630690hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv6593630690 #yiv6593630690ygrp-sponsor #yiv6593630690ygrp-lc .yiv6593630690ad 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I already have a PIC design that replaces the key assigner and addsMIDI, but it's based on the Korg code, and seems to have the same delayas the original MCU, so it must be built into the code.  It's hard to trigger 
the scope on the direction change, so I can't be sure.   Probably I should 
trigger on the interrupt and see how much the envelope of the note 
moves around.    Guess I could look at the code too and try to see wherethe delay comes in, but that's more effort...

Bob

    

      From: "jim@saltlands.com [PolySix]" <PolySix@yahoogroups.com>
 To: PolySix@yahoogroups.com 
 Sent: Saturday, November 15, 2014 5:03 PM
 Subject: Re: [PolySix] Arpeggiator Timing - Slight Irregularities?
   
    Alrighty, so it is what it is I suppose. I guess a long winded solution would be fully replacing the arp system with a custom designed version such as an Arduino based device or similar.  #yiv4191902254 #yiv4191902254 -- #yiv4191902254ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv4191902254 #yiv4191902254ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv4191902254 #yiv4191902254ygrp-mkp #yiv4191902254hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv4191902254 #yiv4191902254ygrp-mkp #yiv4191902254ads {margin-bottom:10px;}#yiv4191902254 #yiv4191902254ygrp-mkp .yiv4191902254ad {padding:0 0;}#yiv4191902254 #yiv4191902254ygrp-mkp .yiv4191902254ad p {margin:0;}#yiv4191902254 #yiv4191902254ygrp-mkp .yiv4191902254ad a {color:#0000ff;text-decoration:none;}#yiv4191902254 #yiv4191902254ygrp-sponsor #yiv4191902254ygrp-lc {font-family:Arial;}#yiv4191902254 #yiv4191902254ygrp-sponsor #yiv4191902254ygrp-lc #yiv4191902254hd {margin:10px 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