iplayer audio to lpcm

[batguano999]

 > 
>What I'm hoping to do using get_iplayer is to be able to compare such 
>results with an analysis or decoding to LPCM of the flv by other means. 
>i.e. use ffmpeg or similar. I'm wondering if anyone else here has already 
>done this, or has comments that would help. 
> 
Hi
Are you asking for instructions how to use FFmpeg to convert an m4a file downloaded with get_iplayer to a different format?