So i'm dealing with the C4 engine right now, and its audio capabilities are pretty spartan. For compressed streams, the only codec it allows is ADPCM. Most of the information i can find on this codec is very dated and doesn't seem to be widely used (from what I can tell). Almost all of the converters deal with the container, not the codec (ie wav -> .xyz, not how it gets there).

Any tips on this are welcome.

I'm using a mac. I have boot camp but it would be a serious workflow cramp to have to use it just to convert audio.

2 Answers 2


Sound Converter (available on the App Store) does adpcm encoding under a few formats for Mac.

  • looks like pretty lousy support from what I'm reading though. 10 bucks is cheap, but i'd like to know it's usable.
    – Dave
    Apr 19, 2013 at 15:16
  • It has a few... quirks :) What container are you trying to output in? I could probably run a test...
    – Sonsey
    Apr 19, 2013 at 19:13

Shame afconvert only writes out CAFF ima4 files, otherwise it comes on the osx terminal.. I seem to remember a time when Windows Sound Recorder used to do adpcm files..

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