On 01/01/2013 07:07 PM, Brent Busby wrote: > First off, Happy New Year to all! :) > > Can anyone recommend a quick way of seeing the differences highlighted > visually between two channels in a stereo sample...sort of like a > graphical 'diff' for waveforms? > > I think I may have some Akai MPC2000 samples that somehow were saved by > the Akai as mono samples even though they actually contain two channels > and are really stereo: > > Using 'sndfile-info' on them reports them as mono, but it's just looking > at the 22nd byte in the file, which should contain 0x00 or 0x01 to say > if it is mono or stereo. The file contains 0x00 in that location, so > sndfile-info believes that it's mono because the file header says so. > > However, if I flip the bit in a hex editor and resave the file, now I > can load the file in a sample editor and it seems to have two channels > which play at double speed. I'm still not positive I'm hearing stereo > (if I am, it's very subtle), but I'm definitely seeing two channels > visually, and I know this sample was sampled on the Akai in stereo. > > Any way to do a graphical comparison that will highlight even small > channel waveform differences? > Invert the phase of one channels (volume *=-1) and downmix to mono. If both channels are identical it'll result in a flat zero line. I'd use rezound for that, but pretty much any soundfile editor should do. HTH, robin _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
