ghe wrote: >> Please note that the subject of this conversation is mp4 (not mp3). > > It's claimed that sox will handle mp4: > > https://stackoverflow.com/questions/2666425/how-to-i-configure-sox-to-work-on-mp4 > > (You do have to install LAME.) > >> If you only process uncompressed audio then sox is fine. > > It will do the mp's and flac. That I know of -- there may be others. > > It normalizes things too. I do that in flac. I don't know if it > normalizes mp's.
I was always thinking that the problem is the mixing of multi-channel audio into L/R, where the special effects for some reason are very loud. It has been some time since I last looked into that, but AFAIR (I'm using mplayer mostly) I saw it saying mixing 5.1 to 2 on the fly or something like this. but my question here is - why the subject with mp4s - do only they suffer this problem or it is just a case among others?
