Hi, I would like the use of a general audio re-mixing filter. It should be able to resample the sample rate, as well as re-mix channels. I've begun to write my own, I did resampling no problem (as supreme quality is not necessary and simple linear filtering sounded OK to my ears). I started writing the channel mixer, but it is extremely difficult to do it well. For example, if converting 5.1 or 7.1 surround sound to stereo, I don't want to take a channel that is supposed to come out on the right and send it into the left speaker. Is there a filter that does this?