Hello folks, I've been trying to work out a way to route my program's audio output to a specific AirPlay device; ideally, as a system output device, and *without *needing to have already selected the device through System Preferences or the AirPlay menu bar item.
There exists an ancient blog post describing how this process used to work in Mountain Lion, https://joris.kluivers.nl/blog/2012/07/25/per-application-airplay-in-mountain-lion/ , but AirPlay devices are no longer exposed as system output devices in the same way (since Yosemite or El Capitan). While looking for leads, I found this tidbit in the header for AudioTransportManager inside AudioHardwareBase.h, which describes a process for making AirPlay devices into AudioEndPoints that programs can output sound to: https://github.com/phracker/MacOSX-SDKs/blob/master/MacOSX10.9.sdk/System/Library/Frameworks/CoreAudio.framework/Versions/A/Headers/AudioHardwareBase.h#L388 However, asking for the list of TransportManagers the way the header prescribes turns up an empty list (Swift playground code): https://gist.github.com/jcm93/98be5d2878d1e4a62c6b2dc9c14e0bcb I filed a DTS incident to ask about this, and heard back that "there is no supported way to achieve the desired functionality given the currently shipping system configurations." I've already filed an enhancement request. So, in the meantime... can anyone think of an unsupported way?
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