TUNE and ARPEG UP-DOWN buttons
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Hi, I'm not sure if this could be related to the GliGli Teensy upgrade, but lately my TUNE and ARP Up-Down buttons no longer work. HOWEVER, sometimes they do and I don't understand this. It's prolly not the membrane switch so what else could it be? Anyone has similar behavior of these (or other) switches? Thanks.
Update: I've reinstalled the original Z80 CPU and both TUNE and ARPEG UP-DOWN are functioning correctly again.
If the Gligli mod worked otherwise fine in your synth, it sounds like one of the pins on your Teensy may not be making contact with the socket properly.
Fast forward several days: I accidentely left the ARP ASSIGN on for at least 30 minutes and after that, the P600 went absolutely crazy: touching the pitchbend crashed the P600 hard and after a while it did not work at all and all kind of LEDs turned on upon power cycle. So I flashed the Teensy with sysex once again and this solved the pbwheel issue but all the presets where corrupt and now OSCA/B FREQ did not work properly either, so I pulled the Teensy and flashed it again over USB with Teensy Loader for Mac (in order to do that I had to restore the trace-cutter 5V pad with a blob of solder). Now it's working fine except for the same TUNE and ARP UP-DOWN buttons. I'v also tried different p600fw in the past to no avail. I'm currently using the 2.10 third release candidate v2_0992 BTW. Hope this helps someone in the future having similar problems with erratic behavior of the Teensy! I did check all the pins and also put some extra solder on pin30 for a snug fit.... I now wish the auto tune during powering up from previous firmware versions was still present! All I had to do then was power off-on during recording if the oscillators were drifting. Oh well...
Make sure you don't have a counterfeit Teensy.
Update: something was wrong with the PB wheel and/or CV circuit and this caused all kinds of problems mentioned before. I tried to calibrate the wiper voltage (2,5V when centered while adjusting the pot and I accidentally over-voltaged the CV circuit I guess). Good thing is ARPEGGIATOR, OSCA/B FREQ, ARP UP-DOWN and TUNE buttons all work again. Pitchbend is now dead but when repaired I will report the problem when it's fixed.