I tried playing a DVD with Kinoamp. (I modified the !boot files of both Cino and KinoAmp, so that KA played vobs that were double clicked on, then used DVDFS).
The results were pretty good. Whereas the frame rate was better with Cino, the audio was very broken.
KinoAmp only managed about 3 - 4 frames/second in multi-task mode, but the audio was almost perfect (a dropout every couple of minutes).
The disks the players manage to play is different.
(Presumably down to the audio channels).
KA very successfully played Lichtspielhaus by Rammstein, which Cino couldn't (this disk is PCM audio)
Other disks Cino could play and KA couldn't.
Cino alway produced choppy audio, KA if it worked always produced clean audio.
It also seems that there should be a standard set of APIs that media players could use, so that a user could use one player to deal with all media, CD, videos, mp3s, TV tuners etc. Is this what Acorn Replay provided?