Comment 60 for bug 602934

(In reply to comment #46)
> AMR narrowband appear to be exported correctly, but when imported the file is
> double the original length and at half the original frequency.

This is because the newer FFmpegs include a native amr decoder and the default
sample format for them is float whereas the default for the opencore amr
decoder it 16-bit. When using the "ffmpeg" command to decode a amrnb file, it
spits out the following message:

Incompatible sample format 'flt' for codec 'pcm_s16le', auto-selecting format
's16'

So, the ffmpeg command line tool can detect and handle sample format
differences. It seems that Audacity can not. Looking into why.

Leland