After demuxing and transcoding a 5.1 .AC3 audio channel,I've got a clicking, or popping sound, coming out of the left speaker, at certain times during the movie, like music bits for example.

I've demuxed an .AC3 3_2 channel audio track with DVD2AVI 1.76. I'm using AC3Machine v.41 to change the framerate from 25 to 23.976.
All other defaults have been mostly unchanged.

The channels mode is set to 5.1, and the bitrate is at 448, just like the original.

Any clues why this should be happening???