[Flac-dev] Re: More than 8 channels possible?
brianw at sounds.wa.com
Thu Mar 31 17:16:57 PST 2005
Are there any recording applications which create files with more than 8
channels? For that matter, are there any recording applications which create
files with more than 2 channels?
I do a great deal of live multi-track recording. Every tool I use creates
mono recordings. At most, I combine microphone pairs or stereo electronics
channels into stereo files after recording. Then, when backing up, I use FLAC
to compress the mono and stereo files. My recording software already organizes
the files for one session into a directory, so the FLAC files live in that
One way to save space is to use the "--no-padding" option. Apart from
padding, there is very little overhead in a FLAC file. A theoretical
16-channel FLAC file would not take any more space that 16 or fewer mono/stereo
FLAC files, at least not if you combine related channels into stereo files.
How do you know what the storage requirements would be reduced? The most
savings comes from inter-channel correlation. I doubt you'll really ever have
more than four channels that actually have real correction in the audio.
NOTE: Adding support for more than 8 channels would increase the FLAC overhead
by increasing the size of the header!
Begin forwarded message:
1. Would it be possible for FLAC to support more than 8 channels?
2. If (1) is not desirable because it would break compatibility or some
such, then is it possible to build a local copy supporting more
channels by simply increasing FLAC__MAX_CHANNELS in
Either of these would greatly help in reducing the storage
requirements for recording sessions.
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