====== Audio Conversions ======

===== Split FLAC files =====
  $ sudo apt install cuetools shntool flac
  $ shnsplit -f input.cue -t %n-%t -o flac output.flac
  
===== Convert from APE to FLAC =====
You'll need flac, bchunk and ffmpeg. If you run Debian or Ubuntu, just type
  $ sudo apt-get install flac ffmpeg
The first step is to convert the whole .ape into .wav.
  $ ffmpeg -i input.ape output.wav
And convert to flac.
    $ flac --best output.wav
Then you split the .wav into individual tracks.
    $ shnsplit -f cuefile.cue -t %n-%t -o flac output.flac
You can then remove the .ape, .cue and interim .wav files.

===== Down convert 24-bit FLAC to 16-bit FLAC =====
==== Basic example - without resampling ====
  $ ffmpeg -i input.flac -sample_fmt s16 -ar 44100 output.flac
List sample formats: ffmpeg -sample_fmts
List additional flac encoding options: ffmpeg -h encoder=flac

==== With resampling ====
FFmpeg supports two resamplers: the default swresample library, and the external SoX resampler (soxr).

=== aresample filter example ===
  $ ffmpeg -i input.flac -af aresample=out_sample_fmt=s16:out_sample_rate=44100 output.flac

Either example will result in the same output: you can verify with the hash muxer.
Changing the dithering method
See the -dither_method option for a list of available dithering methods and additional resampling options. Example:
  $ ffmpeg -i input.flac -dither_method triangular_hp -sample_fmt s16 -ar 44100 output.flac

=== The SoX resampler ===
To use soxr your ffmpeg must be compiled with --enable-libsoxr. Then choose it with the -resampler option:

  $ ffmpeg -i input.flac -resampler soxr -sample_fmt s16 -ar 44100 output.flac

Or use the aresample filter to do it all:
  $ ffmpeg -i input.flac -af aresample=resampler=soxr:out_sample_fmt=s16:out_sample_rate=44100 output.flac