Hi,
I just have a mk2 for a few days and I notice a present noise floor on the mail/headphone output.
Even when the machine is not playing and you turn up the volume from half way and up you can clearly hear this on the headphones. and the input lights on the octatrack are showing incoming signal.
(I have connected the Rytm main output to the Octatrack input)
This doesn’t seem normal is it?
Edit/Fix: The compressor is enabled and this is causing the base noise
I was a bit too eager posting this question 
Menno