So I just submitted a ticket for the out-of tune Messenger. This is not a temperature stability issue. The instrument is quite stable. All patches are sharp by about 2-3 percent. I’m just working around it now by tweeking the tune pot and resaving the patch. I have read some online back and forth about possible causes and fixes, but I don’t think any of them are correct. The “pot calibration” answer does not hold up to close scrutiny. I can bypass the pot by sending a MIDI control message commanding the TUNE to dead center, and the voice will be slightly sharp. I suspect there is some variation from instrument to instrument, and InMusic doesn’t want to incur the cost of individually calibrating every unit off the assembly line. But they could at least give the USER a method for calibrating their own instrument. There is an undocumented procedure that presumably allows a calibration with the “settings / config / 4, 14” action, but it doesn’t work, or it needs to be documented.
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