[linux-audio-dev] Merging digital sampling sessions

Hi, I have a minidisc player with S/PDIF output and an ALSA supported soundcard (details if the card are not really important for the problem at hand). I sample recordings via arecord -D spdif -f cd Ok, and here is the rub: playback is not perfect, and neither seems to be the sampling. Probably at times error interpolation sets in, probably at times samples get lost or replicated. Not much, perhaps once per minute or so. This leads to audible clicks, of course. Then there are leading and trailing zeros. Now what I want to do is just sample the stuff three times and do a three-way merge. Never mind clever click detecting and interpolation schemes: just use redundancy. I have not found a tool for that. Anybody have a clue how to go about that? If things come to worst, I'll have to write a merging tool. Bonus points would be if the thing worked on-line, taking one recording, sampling new samples and just writing the diff out. Run this three times, then run a merge program on the first complete sampling as well as all diffs. That would save quite a bit of disk space. However, it is not really mandatory: just merging three full size files would be fine. Anybody have an idea whether there is some suitable starting point or utility for this kind of thing? -- David Kastrup, Kriemhildstr. 15, 44793 Bochum