Hi Dominic,
you can change the output to an AudioDeviceID on the AudioUnit of the
outputNode.
OSStatus err = AudioUnitSetProperty([[audioEngine outputNode] audioUnit],
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global,
0,
&deviceId,
sizeof(AudioDeviceID));
This works for us for years now.
Hope this helps.
Best,
Tamas
> On 2019. Sep 28., at 2:56, Dominic Feira via Coreaudio-api
> <[email protected]> wrote:
>
> 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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