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View Full Version : Audio Time Scale Utility!

Xesdeeni
29th March 2003, 05:00
http://www.geocities.com/xesdeeni2001/WSOLA.zip
http://www.geocities.com/xesdeeni2001/WSOLASource030328.zip

Here's a first pass at an audio time scale utility. It will take an input WAV file and create an output WAV file with the duration specified, without changing the pitch of the audio. I'm sure this is not bug-free (see Readme), it's not super fast, and I'm still not convinced that it's completely free of audible artifacts, but I think many who are converting films from/to PAL to/from NTSC will want to give it a try to avoid the 4% pitch change.

Let me know what you think (but please be gentle, I only researched the web to find a decent algorithm to steal...err...borrow).

Xesdeeni
pacohaas
29th March 2003, 05:15
haven't tried it yet, but a suggestion on geocities: they don't like direct linking, create an index file that has the links on it.
DeXT
29th March 2003, 12:05
The direct links are OK on Geocities, but seems they have been messed up a little. Here are the correct links:

http://www.geocities.com/xesdeeni2001/WSOLA.zip
http://www.geocities.com/xesdeeni2001/WSOLASource030328.zip

Thanks for your work!

DeXT
Xesdeeni
29th March 2003, 23:11
Sorry all. pacohaas is right, Geocities doesn't like direct links. Here is the indirect link :) : http://www.geocities.com/xesdeeni2001/

Also, I've updated my Standards Conversion page (http://www.geocities.com/xesdeeni2001/StandardsConversion/index.html) to reflect usage of this utility.

Xesdeeni
Xesdeeni
29th May 2003, 14:53
This utility still has serious problems, but I'm afraid it will definitely be a while before I get back to it.

Since BeSweet is everyone's favorite audio processor, would it be possible for someone to look into adding this algorithm to BeSweet?

Xesdeeni
DSPguru
29th May 2003, 15:32
Originally posted by Bach
this someone must be dpsguru. It is not possible to create an external plugin using this algorithm, given the current interface for external plugin.why ?
DSPguru
29th May 2003, 16:07
but i don't have the time to work on it...
i suggest that you try creating a plugin with fixed presets (ntsc2pal, etc'..).

btw, which algorithm is being implemented in this code ? (as you can see, i don't even have the time to download..)