In this chapter we have browsed through various audio-related items and procedures of paramount importance in real life FreeSWITCH implementation. Audio is the Alpha and Omega of telephony, and by taking good care of it you will be the good guy in the VoIP world. FreeSWITCH gives you so many tools. We just scratched the surface here, and using FS positions your project at the forefront of telecommunication, ready to take on the challenge of HD audio. We demonstrated how to deal with audio files, transcoding formats, recording prompts and messages, and recording entire calls (both legs) to a stereo file. Lastly, we saw how to listen to, and interact with, someone else's call.

There is so much more to explore about Audio in FreeSWITCH, but we hope we gave you a glimpse, and the motivation to browse the official documentation.