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Editorial Team
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Asked: 2026-06-03T07:01:06+00:00

I’m attempting to write an AAC file from the output stream of an AUGraph,

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I’m attempting to write an AAC file from the output stream of an AUGraph, and on playback my file only plays a buzzing noise, and I get the error ExtAudioFileWriteAsync -50.

I’d like to know what it means so that I can search for and destroy the problem.

Thanks to any Core Audio ninjas that can hook a brother up.

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1 Answer

  1. Editorial Team

    In case anyone else has this problem, the -50 error is a kAudio_ParamError error, defined in CoreAudioTypes.h.

    Therefore, one of the parameters being passed to ExtAudioFileWriteAsync must be faulty.

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