Cov Posted November 11, 2011 Share Posted November 11, 2011 Is there? Quote Link to comment Share on other sites More sharing options...
David Nahmani Posted November 11, 2011 Share Posted November 11, 2011 Before joint stereo, people used to use two mono files for stereo: one for the left channel, the other for the right channel. Joint stereo is a single, 2 channel audio file. Quote Link to comment Share on other sites More sharing options...
Cov Posted November 12, 2011 Author Share Posted November 12, 2011 Does this imply any difference in perception, or ends up being the same? Quote Link to comment Share on other sites More sharing options...
ski Posted November 12, 2011 Share Posted November 12, 2011 Same. Now, to get really picky and stuff... If you take two mono audio files recorded at different times (i.e., not two microphones capturing the same sound source simultaneously) and pan one left and one right, the result is stereo. Thing is, it's a stereo mix of two mono sound sources. If you capture the audio of a sound source with two microphones simultaneously, whatever signal is picked up by the left mic is actually mono. Same with the right mic. When played back simultaneously (and panned hard L/R), what you hear is true stereo. Finally... Let's say you have a truly mono sound source playing out of Logic. Say, a mono hand clap, panned right up the center. Now bounce it as a stereo file. The result is a "dual mono" file where the information in the left and right audio files is identical. There's no real point in making dual mono files unless the sound is actually panned off-center. In that case, the sound will be identical in both files, but one will be louder than the other. HTH, Ski Quote Link to comment Share on other sites More sharing options...
David Nahmani Posted November 13, 2011 Share Posted November 13, 2011 Does this imply any difference in perception, or ends up being the same? Exactly the same. Quote Link to comment Share on other sites More sharing options...
Cov Posted November 15, 2011 Author Share Posted November 15, 2011 Thanks guys Quote Link to comment Share on other sites More sharing options...
fader8 Posted November 15, 2011 Share Posted November 15, 2011 If you're talking about Joint Stereo in context with the creation of MP3 files, then the definition changes a bit. There are a few different methods in use for creating joint stereo MP3 files, but the basic idea is to take everything that is identical to both the left and right channels and encode that as one chunk, then take the difference, (what's left over) and encode that to another chunk. Theoretically, this gives you better quality for a given bit rate, but that doesn't always work out. Some encoders downmix all the low frequencies to mono first before doing the joint encoding. I don't know exactly how Logic's joint stereo encoder works, though. Never used it. Quote Link to comment Share on other sites More sharing options...
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