[IDEA] Polarity Flip

[TheOldPresbyope]

AFAIK, doing it on-the-fly while song is playing or doing it on a per song basis would require the feature to be part of MPD itself. Maybe someone could could post a feature request in the MPD Git :-)

There does seem to be some confusion as to whether the ttable coefficient is performing a phase shift or polarity flip. I think it must be performing a polarity flip when its negative because the coefficient itself represents a volume  %. Its probably just confusion over the terminology.

https://www.diyaudio.com/forums/pc-based...-alsa.html
https://www.justmastering.com/article-ph...larity.php

I'd be willing to bet the pcm route type plugin does only polarity inversion (aka flip) but the answer lies in the source code. I haven't found the source for pcm route plugin yet, just a bunch of function references.