Produce a similar project for headphone downmix?

[q-p]

Produce a similar project for headphone downmix?

[q-p]

Hmmmmmm. There's already http://hajoheadphone.com that does something along these lines, I think.

Integrating something like this into SoundPusher.app would mean refactoring the output-side of the chain as well as some of the set-up code (e.g. enumerating and selecting the output formats). I personally don't use headphones, but I'm not averse to merging something like this if there's interest.

SoundPusher.app already uses FFmpeg, so if one wanted to do a headphone down mix, I'd either use af_sofalizer (but I currently don't use any FFmpeg filters) or hope that libswresample gains such an ability in its down mix.

[q-p]

I don't think this makes sense to do here (i.e. in SoundPusher.app). Using FFmpeg to do a binaural downmix could happen, but I have no interest in doing that.