hi I just tested latest build 841 with a wired headphones, and the fade in bug when "tap to play" a song is still there. I spent over an hour customizing Poweramp settings. I disabled all possible settings and tested on 3 different phones with 3 different Android versions ("LG G3 with Android 6", "HTC U11 with Android 8.1", "Motorola G4 with Android 7".
Played is in pause mode, then "tap to play" and the fade-in is there, not just at the beginning of the track, even in the middle. I already tried 4 different headphones, same results. HD audio setting is not enabled. No stutter or skipping, just the tiny fade-in. No fade-out at the end of the song though or when switching songs. I even tried to disable all settings to see if something was causing it... no luck. Maybe my phone is too old ?
Note: it only happens when player is paused. If you tap "next" or "previous" while a music is playing, to this bug doesn't happen.
I tried 320kbps mp3 files and flac files. All the same. I only use flac audio files, never mp3.