LÖVE

Is it possible to have a sound output device object and send it PCM to have played? Otherwise it would be very unfeasible to implement a custom audio format.
In laymens terms, I'd like to manually buffer audio.

love.audio doesn't expose this. It would be kind of tricky since it involves another thread. If you want that you need to modify LÖVE.

It wouldn't need a separate thread. And I guess you could call this a suggestion noiw

I think what Boolsheet means is that love.audio's existing (internal) audio streaming is already done in a separate thread, which creates problems with exposing a lower level API for it.