semi OT input callback question

edited June 2013

Semi off topic question here. I hope you fine folks won't mind terribly if I ask a general AudioUnit question as I'm not having much luck finding the answer elsewhere and am hoping someone here might know.

Both input and render callbacks one sets on a remoteIO unit have the same function signature. In the case of an input callback, the final AudioBufferList parameter (e.g. ioData in many sample projects and docs) is NULL and appears to serve no purpose at all.

Does that parameter ever serve a purpose beyond matching the AURenderCallback function signature?


  • p.s. sorry for the multiple posts! I received an error (due to the presence of a : in the subject line apparently) when trying to post.

    Any chance you could delete the duplicates? Thanks!

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