https://ffmpeg.org/doxygen/8.0/wmavoice_8c_source.html
FFmpeg: libavcodec/wmavoice.c Source File
ffmpegcfile
https://blogs.gnome.org/rbultje/2010/04/30/wmavoice-postfilter/
WMAVoice postfilter | Ronald S. Bultje
Apr 30, 2010 - I previously posted about my ongoing studies on the WMA Voice codec. A basic implementation of the actual codec was submitted and accepted/applied into FFmpeg...
ronald