Subject: Re: 1. MP3 or AAC mixing in compressed/coded domain (2) From: "Crockett, Brett" <BGC@xxxxxxxx> Date: Mon, 2 Mar 2009 09:29:11 -0800 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Sony Vegas is a DAW as well as video. If I understand the question, he's asking about mixing in THE CODED DOMAIN and not doing a decode, mix and re-encode. You can't do that easily and there are no commercial mixing solutions available. -----Original Message----- From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx On Behalf Of Lorenzo Picinali Sent: Monday, March 02, 2009 2:47 AM To: AUDITORY@xxxxxxxx Subject: 1. MP3 or AAC mixing in compressed/coded domain (2) 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@xxxxxxxx Tel 0116 207 8051 ----------------------------------------- This message (including any attachments) may contain confidential information intended for a specific individual and purpose. If you are not the intended recipient, delete this message. If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited.