Things aren't always what they seem, but here goes....

In a past life I worked in real time software and industrial controls. This involved a lot of reading various sorts of encoders and writing to lots of output devices. The deal with the 1050 volume knob looks a lot like the processor missing volume knob encoder ticks.

This can be due to many things, but typically it is because somebody decided, either due to hardware limitations or laziness, to poll the encoder inputs instead of using a hardware counter or interrupts.

So if this is true I suspect the DSP getting busy for whatever reason would tend to make the volume knob less reliable. Again this is all SWAG, but it feels right.


Charlie