From: fmiser <fm...@gm...> - 2015-08-21 17:52:06
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> > Sebastian wrote: > > > > I need to change the amplitude (-v volume) of a mp3 file. > > That is not really a challenge, but I need to change the > > amplitude in one file at several "points". Is there a > > solution for that? Can I say, for example, that the > > change of volume should take place at 0:45, the next at > > 0:55 and so on? Unless it's silent at the volume change, or the change is small, a change in volume that doesn't ramp, or slope, won't sound very good. Ecasound is another capable command line audio tool that focuses more on multi track mixing and so it might have the effect/command you are looking for. I'm not sure. > Ari wrote: > > One solution is to split the file with mp3splt or similar > into parts of different amplitudes, then apply mp3gain for > each part and then join all the pieces back to one file. > > This avoids audio deteration due of uncompress and > recompress cycles. That won't work because mp3gain does not change the audio itself - is is simply a value in a tag that the playback software may or may not honor. And I'm not aware of a way to tag only a portion of a file, so the join process would result in loosing all but one tag. |