Cannot implement audio source/sink that uses fixed formats
The attached module (qubes-pw-module.c) does not work. Attempts to play sound to it fail with
spa.audioadapter: params Spa:Enum:ParamId:EnumFormat: 0:0 (convert format) Success
spa.audioadapter: failed filter:
However, I cannot see any reason why it would fail. #pobrn on IRC suggested I file a bug report.