Merge pull request #4493 from Memphiz/airplaypicvolume

[airplay] - fix unwanted volume restore
Merge pull request #4488 from FernetMenta/paplayer

paplayer: use position based seeks for ffmpeg demuxer
Merge pull request #4495 from FernetMenta/aefixes

WASAPI: add 192khz sample rate in case we added HD formats