mono to stereo freeware downloads
Praat for Mac OS X
6.4.13 freeware download... this, you can also convert a track to mono or stereo, extract all its channels or a single one ...
1X-RIPPER
23.0.0 freeware download... * Options: Bitrate * Options: Modus (Mono / Stereo) * Options: Quality * WAVtoMP3 * MP3toWAV * CDtoMP3 * CDtoWAV ...
Wavosaur audio editor
1.1.0.0 freeware download... real time oscilloscopes. - supports any sample rates, stereo mono or multichannel, 8, 16, 24 or 32 bits ...