'Cropping' a recorded radio programme

[Shevek]

On 11 June 2012 15:59, Geoff Soper <geoff.getiplayer at alphaworks.co.uk> wrote:
> I have a radio programme that I would like to crop to a small section. I've
> tried a few tools but none of them seem to like the format. From VLC it
> seems to be of type "MPEG AAC Audio (mp4a)".
>
> Can anyone suggest how I might do this?
>

This was discussed recently on this list:

http://lists.infradead.org/pipermail/get_iplayer/2012-June/thread.html

Look for the thread "Editing those m4a files"

TL;DR - Use latest build of mp3DirectCut http://mpesch3.de1.cc/mp3dc.html