[wrxtasy]

I haven't noticed audio sync issues either, but need to watch/listen more critically.

Across a 2 hour movie you're shortening playback by 7.2 seconds playing it back fast so there should definitely be noticeable audio sync problems when bitstreaming or periodic audio glitches when it resyncs.

I would strongly suspect you not even getting bitstreaming but rather sly resampling is taking place regardless of Kodi settings when video is sped up to 24Hz.