Asterisk itself can transcode many audio formats such as g722, alaw and ulaw to name a few. Over the years FreePBX itself has required a few binaries to deal with importing MP3s and generating some wav files. These two binaries are important today so make sure they are installed before reading the rest of this article:
- sox (general conversion utility)
- mpg123 (allows uploading of MP3 files)
However Asterisk itself is unable to convert many files into HTML5 compatible audio types .even with the two programs above!
What is an "HTML5 compatible audio file"?