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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,as%20is%20the%20case%20with%20something%20like%20WDMKS.
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 …
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.
Multiple portaudio streams on Linux possible?
https://groups.google.com/g/sparksdr/c/Vt_rKdoufuM
Multiple portaudio streams on Linux possible? ... When I look at the streams in pavucontrol I can see them both listed as. ALSA plug-in [SparkSDR]:ALSA Playback. but they are not distinguished by name. My WSJT-X audio input is set to pulse, there don't seem to be 2 named channels that I can find.
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.
c++ - PortAudio: Play multiple generated sounds by …
https://stackoverflow.com/questions/47740219/portaudio-play-multiple-generated-sounds-by-calling-function
play multiple sounds(i.e. three sounds at the same time, bu calling three methods). In example files it looks more complicated. When I want to play multiple sine waves, so I have to merge all that waves, and then give that data to stream. Maybe someone got better solutions to resolve this problem?
PortAudio: portaudio.h File Reference
http://files.portaudio.com/docs/v19-doxydocs/portaudio_8h.html
Depending on the underlying Host API, it may be possible to open multiple streams using the same device, however this behavior is implementation defined. Portable applications should assume that a PaDevice may be simultaneously used by at most one PaStream. Pointers to PaStream objects are passed between PortAudio functions that operate on streams.
portaudio/portaudio.h at master · EddieRingle/portaudio ...
https://github.com/EddieRingle/portaudio/blob/master/include/portaudio.h
to open multiple streams using the same device, however this behavior : is implementation defined. Portable applications should assume that : a PaDevice may be simultaneously used by at most one PaStream. Pointers to PaStream objects are passed between PortAudio functions that: operate on streams.
Portaudio: Bindings for the Portaudio portable sound library
https://docs.racket-lang.org/portaudio/index.html
The Mac OS X Coreaudio API seems able to support hundreds of simultaneous streams. The Windows API’s that I’ve tested don’t reliably support more than one. On platforms that don’t support more than one stream, then, playing multiple …
psychopy/backend_sounddevice.py at release - GitHub
https://github.com/psychopy/psychopy/blob/release/psychopy/sound/backend_sounddevice.py
"""Keeps track of what streams have been created. On macOS we can have: multiple streams under portaudio but under windows we can only have one. use the instance `streams` rather than creating a new instance of this """ def getStream (self, sampleRate, channels, blockSize): """Gets a stream of exact match or returns a new one
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