Audacity Forum

That's easy to do, just attenuate the tracks to 1/n their volume, where n is the number of tracks you're mixing. Or do a real-time normalization. But he's already tried something similar and complains that although the parts with lots of stuff going on are fine, the passages of the music where only ...

I'll experiment with the FP stuff and see how the performance works out. I'm using it for the software at the link below that I'm developing. An effect I use often in my music is to have a very slow, very subtle vibrato on most tracks, which is what I'll be using it for. http://www.qotile.net/blog/w...

You need a compressor. Might be able to find code for one somewhere. Seems like it wouldn't be terribly difficult to code. Although you'd probably benefit from a multi-band compressor which I think is a bit more difficult to code.

Floating point ops are generally slower. Probably wouldn't make much difference on recent home computers unless you're running on a massive amount of tracks. Would make a difference if it were run on an embedded device or something. Some embedded CPUs don't even have a FPU (like my MP3 player) so in...

Vibrato works. Here's the code, a little rough but you get the idea. Could probably do it with a sine lookup table, all integer math, and no between sample consideration if you're willing to sacrifice a little sound quality for speed. // vibrato for( i=0; i<(length/2); i++ ) // note: length/2 becaus...

update, I found a document that tells how to do a parametric EQ: http://epubl.luth.se/1402-1773/2003/044/LTU-CUPP-03044-SE.pdf And I think I've figured out how to do vibrato -- just resample, distributing the samples earlier/later using a sine wave to control the time displacement. I'll post the cod...

I'm writing audio code in C/C++ using SDL. I'm looking for simple algorithms for vibrato and a very basic EQ with treble/bass/mid. The functions will be applied to 16-bit audio buffers. Thanks in advance for any help.

-paul