Domyślna ścieżka w Asterisk
/usr/share/asterisk/sounds
sox -V vm-intro.wav -r 8000 -c 1 -t ul vm-intro.ulaw
sox -V vm-intro.wav -r 8000 -c 1 -t al vm-intro.alaw
sox -V vm-intro.wav -r 8000 -c 1 -t gsm vm-intro.gsm
Konwersja na g722
sudo apt-get install ffmpeg
ffmpeg -i vm-intro.wav -ar 16000 -acodec g722 vm-intro.g722