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Opening multiple streams for same Device in the same process
https://portaudio.music.columbia.narkive.com/FOxuPUZK/opening-multiple-streams-for-same-device-in-the-same-process#:~:text=PortAudio%20imposes%20no%20limitations%20on%20how%20many%20streams,the%20specific%20host%20API%20supports%20this%20or%20not.
PortAudio: Opening a Stream Using Defaults
http://www.portaudio.com/docs/v19-doxydocs/open_default_stream.html
Although multiple streams can be opened, it is difficult to synchronize them. Some platforms don't support opening multiple streams on the same device. Using multiple streams may not be as well tested as other features. The PortAudio library calls must be made from the same thread or synchronized by the user.
Opening multiple streams for same Device in the same process
https://portaudio.music.columbia.narkive.com/FOxuPUZK/opening-multiple-streams-for-same-device-in-the-same-process
PortAudio imposes no limitations on how many streams can be opened simultaneously on the same device as far as I'm aware, instead it comes down to whether the specific host API supports this or not. DirectSound is written on top of the low level kernel mixer, and so you don't actually acquire exclusive access to the physical soundcard directly as is the case with something like …
Is portaudio able to open multiple audio devices at the ...
https://portaudio.music.columbia.narkive.com/h3SVbKtJ/is-portaudio-able-to-open-multiple-audio-devices-at-the-same-time
Yes it should be possible. Aside from the ASIO SDK mentioned above there is another consideration: some host APIs open the device in "exclusive" mode, which means that no. other software can access the device. It also means that if the device. is already open by some other software PortAudio will not be able to.
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