resynth Are the audio inputs of the expander the same quality as the normal bela mini inputs?
They are full audio quality. On board the BelaMiniMultichannelExpander there are 3x TLV320AIC3106 codecs, which are the same as the Bela/BelaMini cape's audio codec in terms of sound quality (just slightly different on the digital side, but you don't have to worry about that).