Korg Poly800/EX800 Users

I managed to fix the jittery output.  The 8th pot was defective, causing the MC's analog input to float without a steady reference I guess.
  Anyway, that one defective pot messed up the other 7 in that group.  I guess the mod wheel was on some kind of isolated circuit?  I dunno..
Just glad the new pot I put in fixed it!
  Additionally, the old pot must have been impacted by the PO.  Not only damaging the pot, but also the trace/pad for that pot's wiper lead. It was lifted from the PCB when I went in to desolder it!
The new pot's lead is barely making connection..   If it goes bad again, I may have to just remove the pot and ground the input to stabilize the rest.

I still have NRPN problems.

This is a link to the Oxygen's manual..

http://www.m-audio.com/images/global/manuals/051014_OxyLine_UG-EN01_V1.PDF



Here's a copy of what MIDIOX showed when I setup a knob to nrpn control "90", the VCF LFO1 Mod Depth.  I have "GL 16 00"  as my global setting.

   
 024DEEAE   1  --     B0    62    5A    1  ---  CC: NRPN LSB          
 024DEEAF   1  --     B0    63    00    1  ---  CC: NRPN MSB          
 024DEEB0   1  --     B0    06    01    1  ---  CC: Data Entry MSB    
 024DEEE0   1  --     B0    06    02    1  ---  CC: Data Entry MSB    
 024DEF14   1  --     B0    06    04    1  ---  CC: Data Entry MSB    
 024DEF74   1  --     B0    06    06    1  ---  CC: Data Entry MSB    
 024DEFCB   1  --     B0    06    07    1  ---  CC: Data Entry MSB    
 024DF045   1  --     B0    06    08    1  ---  CC: Data Entry MSB    
 024DF078   1  --     B0    06    09    1  ---  CC: Data Entry MSB    
 024DF0CA   1  --     B0    06    0A    1  ---  CC: Data Entry MSB    
 024DF15D   1  --     B0    06    0B    1  ---  CC: Data Entry MSB    
 024DF1C3   1  --     B0    06    0C    1  ---  CC: Data Entry MSB    
 024DF256   1  --     B0    06    0D    1  ---  CC: Data Entry MSB    
 024DF2CB   1  --     B0    06    0F    1  ---  CC: Data Entry MSB    
 024DF3BB   1  --     B0    62    5A    1  ---  CC: NRPN LSB          
 024DF3BC   1  --     B0    63    00    1  ---  CC: NRPN MSB          
 024DF3BD   1  --     B0    06    10    1  ---  CC: Data Entry MSB    
 024DF44E   1  --     B0    06    11    1  ---  CC: Data Entry MSB    
 024DF529   1  --     B0    06    12    1  ---  CC: Data Entry MSB


No response whatsoever from the HAWK with the above stream of msgs, post surgery.  

Any ideas?

Thanks, 
-Blaine




--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> Check for a midi loop.
> 
> Send the text of a batch of the CC messages you're seeing on MIDI-OX.
> 
> 
> Mike
> 
> 
> 
> ________________________________
>  From: bimmerfan222 <bperkins211@...>
> To: korgpolyex@yahoogroups.com 
> Sent: Tuesday, July 30, 2013 8:55 AM
> Subject: [korgpolyex] Maudio midi controller problems..
>  
> 
> 
> Â  
> Ok, this one has me stumped.
> 
> I have a Maudio Oxygen 8 V2 that I just picked up.
> 
> For some odd reason, I cant get the 8 assignable knobs to send proper CC messages.
> 
> Hooked up to the HAWK either direct or indirect thru the PC.  I can see the messages in MIDIOX go thru fine.  But the HAWK only partially responds to any of the knobs.. it's like it hears it for a moment, then suddenly does not hear it.
> If I turn the knob really slow, I can get more reaction from the HAWK, but it's still jittery.
> 
> Odd thing is, the assignable Mod Wheel (next to the pitch wheel). Will send a CC flawlessly.. no jitters or problems whatsoever.
> 
> So what would cause this?  Again, I can see it sending all the messages in MIDI OX, but HAWK seems to only pick up part of the msg stream when using one of the 8 knobs.
> 
> I do know that the very last knob has an issue where it wants to deviate to "33" when it is set to 0-127.  I have disabled it, I suspect it has a cold joint or defective pot.  The others dont act like that.
> Looking at the PCB, it appears each knob has it's own path to the main CPU (tiny stamp sized PIC thing). 
> 
> Any ideas?   I was hoping to splice in a organ pedalset into the keyboard matrix later on.. but this knob issue has me scratching my head.
> 
> -Blaine
>