2018-02-09 15:06 GMT+01:00 Jim Shupert <jshup...@theppsgroup.com>:

> I see by the documentation :
> FLAC (Free Lossless Audio Codec) Encoder
> compression_level
> Sets the compression level, which chooses defaults for many other
> options if they are not set explicitly.
> Valid values are from 0 to 12, 5 is the default.
> My question is:  what should the compression level be for
> mathematically lossless

The flac format does not support lossy compression, all values
lead to mathematicallylossless encoded output files.
(Bugs in software exist!)

Carl Eugen
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