#6808 ZVISION: Sound distortion in Zork Nemesis end credits

[Torbjörn Andersson]

Current Git snapshot of ScummVM, English version of the game from DVD version of ZGI.

During the Zork Nemesis end credits, there is a slight periodic distortion in the background music. I think the end credits is an AVI video, and that the music is part of that. My only theory so far is that RawChunkStream::readNextChunk() is incorrect in assuming that the entire rest of the stream is audio data. But I don't know.

[Torbjörn Andersson]

Just to clarify what I'm talking about, here's a short clip of the audio that I captured by having ZorkAVIDecoder::ZorkAVIAudioTrack::queueSound() dump its data to a file that I then converted to MP3.

[Torbjörn Andersson]

Oddly enough, it seems there are actually two versions of the music playing at the same time. It's a bit hard to tell with these drawn-out choral chords, but that's how it sounds to me. One is probably the background music from the room itself, while the other is the audio for the credits cutscene.

So presumably, either it should stop the background music or it should mute the credits cutscene?

[Torbjörn Andersson]

The impression I get from playing the original is that the background music keeps playing, and there's no music from the ending cutscene. But, as I said, it can be a bit hard to tell. I'm attaching a savegame from the DOS version.