Just picked up an Octatrack MKII, I noticed a high pitch whine from the hardware, not really noticeable in practice. If I put my ear very close to the case I can hear it, or put it against the rear case to really hear it.
Is this normal? The MKI does not have this whine. Also tried the same power supply on the Digitakt and there is no whine what so ever there.
Note the audio out does not have any whine.