Purists Audio Player with ES9038 DAC - plays from SD-card and USB , or SPDIF input

JohnW said he thought ESS harmonic distortion compensation sounded best when disabled. Other people seem to like it though. IME ESS dacs sound best when operated in fully synchronous mode. ASRC PPLL (polyphase locked loop) jitter maybe could have something to do with it. As with PLLs it seems to help to have clean power rails.
just a test of MP3 decoder, (floating point ) , i wold say: sound is good - no clear difference to uncompressed PCM ; at least at 320 kb MP3 ;
1.1 kHz sin test :