Re: AVAudioEngine input and output devices
Re: AVAudioEngine input and output devices
- Subject: Re: AVAudioEngine input and output devices
- From: Dominic Feira via Coreaudio-api <email@hidden>
- Date: Fri, 27 Sep 2019 20:56:56 -0400
For the record, DTS has confirmed that everything I have posted below is
correct. AVAudioEngine can only be used with the default input and output
devices. The fact that AVAudioEngine ever shipped for the Mac like this at all
says a lot.
— Dominic
> I have been working with AVAudioEngine.
>
> By default the AVAudioEngine is using an aggregate audio device with the
> default input/output as the subdevices. This makes sense so the entire engine
> can run on a single clock.
>
> Is it possible to set the input and output devices to use something other
> than the system?s default input and output?
>
> From experimentation, if I set the input or output to anything other than an
> aggregate device it fails. If I change the input and output to use the same
> aggregate device (that I created with non-default devices), it works. However
> any time the default output or input of the system changes, the engine?s
> input/output are set back to the aggregate device set up by core audio that
> uses the default input/output, basically overriding what I told the engine to
> do.
>
> I hope that I?m missing something obvious, but I think I have run into the
> limits of this API. For an API that has been on the Mac for several years it
> is very limited.
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