-*- outline -*-

* Suitable convertors?

  $ sudo apt-get install ffmpeg
or
  $ sudo apt-get install sox

* List of sox supported format.

See sox(1).

* List of ffmpeg supported format.

  $ ffmpeg -formats

* How convert amr to ogg/mp3?

  $

* How easy convert between mp3/wav/ogg?

  $ sox in.mp3 out.ogg
  $ sox in.ogg out.wav
  ... etc