I'm sure you did, but just in case - did you checkout Sox?: http://sox.sourceforge.net/ http://sox.sourceforge.net/ I've used both FFMpeg and SoX extensively

I'm sure you did, but just in case - did you checkout Sox?: http://sox.sourceforge.net/ http://sox.sourceforge.net/ I've used both FFMpeg and SoX extensively for audio and have found SoX very useful on more than 1 occasion.