Format of BBC Radio 4 .m4a files

Jon Davies jon at
Fri Sep 11 04:35:21 PDT 2015

On 9 September 2015 at 12:28, Jim web <web at> wrote:
> Why not flac?

because as others have pointed out, the raw data downloaded from the
bbc is aac.  you can't improve the quality by removing compression,
all this will do is occupy more space on your disk.  All get_iplayer
does by default is re-package the (unchanged) aac data in an mp4 file.
If you ask get_iplayer for mp3 then whether it was built to transcode
directly from the original aac or via flac would make no difference


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