[asterisk-users] mixmonitor - convert wav to mp3/aac

[Thorsten Göllner]

Am 18.09.2014 11:06, schrieb Marek Cervenka:
> hi,
>
> i want convert mixmonitor recorded speech audio from wav to mp3 or aac
> can you recommend your settings for speech audio? filters, noise
> elimination, compression ratio, ...
>
> i will probably use lame

Give sox with compiled mp3-support a try:

/usr/bin/sox ${src_file} ${dst_file} lowpass 4000 compand 0.02,0.05
-60,-60,-30,-10,-20,-8,-5,-8,-2,-8 -8 -7 0.05

I found it on another website ... but I can't remember. Works fine for me.