The second channel in Audacity looks bad. The waveform seems to be not symmetrically to 0. It would be nice to see a zoom in to a short time period, to see the waveform.
?
Maybe the amplifier for this channel is not ok (IC405 or IC406? or output of IC403 to IC405 and IC406). Of course one input of PCM1804 could also be affected.
?
73 Ludwig
