I must be missing something. Do recorded programs have the same audio sync problem? This is a band-aid to the root problem. Since I'm guessing the majority of users don't have this problem... myself included.
Decoders affect audio and video quality in many ways so they are the best place to start tweaking. If recordings play poorly in other players it might be the source. MPEG-1 audio is still used on cable system digital and analog output in US and Canada.