Convert Data to sound and back

Question

Are there libraries out there that can convert data (text files, etc) to sound and back to the original data?

The sound can be transmitted any medium I wish, whether rad

Answer 1

Does the audio file need to be convertible using lossy compressors (MP3 etc.)? If not, you can just add a WAV container around any binary data and you'll be fine. Otherwise it gets more difficult, and you need to ensure that the audio is audible (in a reasonable frequency range when played) and be tolerant enough on the frequency detection to match the output of lossy codecs.