1. Yes by design, but i may change that.
2. I have no control on this. The pot directly change all the DACs reference voltage. It's not digital.
3. Yes we can hear something strange at low level when we turn up the headphone amp up. Not sure what it is. MCP4922 DAC effect ?
oh and another really strange thing is that i'm always editing the parameters of all 4 instruments at once.....
All instrument at once ? Someone already reported this... And i don't know at all how this can happen.
Do you have midi Thru enable on the PreenFM ? Can that be a midi loop between your sequencer and the PreenFM ?
Do your 4 instrumens listen to different midi channel ?
Let me know if you have more information,
Xavier