How could I multicast audio on MacOSX? Suppose I have headphone jack on mbp and a usb hub and an external soundcard and god knows what else and I don't have a headphone preamp: could I send audio to multiple outputs (2 sets of headphones) somehow? In Settings GUI apple allows to select single output only.
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1Something like Aggregate Device? https://support.apple.com/en-us/HT202000 – Mateusz Szlosek Feb 27 '23 at 12:59
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1Assuming they are wired as Bluetooth isn’t going to work, look at this solution: https://apple.stackexchange.com/a/251360/119271 – Allan Feb 27 '23 at 14:32
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Yes Mateusz, Aggregate Device is what I was looking for. Feel free to farm this out as an answer. – Anton Tropashko Feb 28 '23 at 12:16