1. MP3 or AAC mixing in compressed/coded domain (2)

[Lorenzo Picinali <LPicinali@xxxxxxxxx>]

Dear All,
I'm not sure I've understood properly, but it seems to me that Sony 
Vegas is not a DAW, but a video editing software...
It is plenty of audio editing and mixing software that can open MP3 or 
AAC (AC3) files, but what they do is they all convert the compressed 
files in an uncompressed PCM format, and then perform all the mixing and 
editing operation, and convert them back to the compressed format after 
the processing. This is fore sure a good method with short files, but 
having for example a ten ours MP3 stereo recording, on a normal PCM 
format would be nearly 10 Gb of data, therefore for mixing and editing 
directly in MP3, in this case, could be a very good idea.
I'm not aware of any available software that directly mixes compressed 
files, but for the editing you could use http://mpesch3.de1.cc/ , which 
allows you to cut MP3 files and change the volume...
A friend of mine has been working on a software for the mixing directly 
in compressed format (Dr. Giancarlo Vercellesi, you can find online some 
of his publications), and there are some software prototypes for this, 
but nothing available yet...
Yours
Lorenzo Picinali

Lorenzo Picinali
Faculty of Technology
De Montfort University, The Gateway
Leicester, LE1 9BH
lpicinali@xxxxxxxxx
Tel 0116 207 8051