On Thu, Sep 09, 2004 at 11:21:35AM -0700, Mark Knecht wrote: > On Thu, 2004-09-09 at 11:02, Eric Dantan Rzewnicki wrote: > > ecasound! > > ecasound -a:1 -i:mono1.wav \ > > -a:2 -i:mono2.wav \ > > -a:1,2 -f:24,2,96000 -o:stereo.wav \ > > -a:2 -erc:1,2 -eac:0,1 > > Do that all on one line. The returns are escaped to make it easier to > > read. This creates 2 chains, one for each input mono wav file. Both > > chains are connected to the same output file. You have to set the format > > for the output because ecasound defaults to 16,2,44100. You don't need > > to set the format for the inputs if they are .wavs because ecasound will > > read the info from the wav headers. Then for chain 2 you route channel > > one to channel two (-erc:1,2), and mute channel 1 (-eac:0,1). > > -ERic Rz. > Thanks. I'll give that a try. At least that handles step one, assuming > no audio problems are created. If step 2 was downsampling to 16 bit 44.1kHz, then just change the -f above to: -f:16,2,44100 ... sorry I missed that bit. The internal sample rate conversion is linear interpolation, I think, which works ok. But, if you have libsamplerate installed ecasound can use that instead for higher quality conversion. libsamplerate support is enabled at ./configure time. I always install ecasound from source, so I'm not sure how the various distros compile and package it. I suppose on one of your gentoo boxes that should be no problem. -Eric Rz.
