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portaudio - How to get separate input from multiple usb ...
https://stackoverflow.com/questions/31333594/how-to-get-separate-input-from-multiple-usb-microphones
I am using portaudio and trying to get input from two separate usb webcam microphones. I connecting to two separate devices yet the data I get seems to me mixed (speaking into one microphone shows...
PortAudio - an Open-Source Cross-Platform Audio API
Many applications use PortAudio for Audio I/O. PortAudio provides a very simple API for recording and/or playing sound using a simple callback function or a blocking read/write interface. Example programs are included that play sine waves, process audio input (guitar fuzz), record and playback audio, list available audio devices, etc.
PortAudio: portaudio.h File Reference
http://portaudio.com/docs/v19-doxydocs-dev/portaudio_8h.html
A single PaStream can provide multiple channels of real-time streaming audio input and output to a client application. A stream provides access to audio hardware represented by one or more PaDevices. Depending on the underlying Host API, it may be possible to open multiple streams using the same device, however this behavior is implementation defined.
Configure all inputs and all outputs of a single USB Audio ...
https://github.com/dechamps/FlexASIO/issues/58
PortAudio has some rudimentary support for opening multiple devices at the same time, but only for the MME backend. This means that, if someone were to expose this PortAudio feature through FlexASIO (which, currently, it is not), you would be forced to switch to the MME backend to make use of the feature, and would have to suffers the limitations of MME (latency …
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.
PortAudio Development Status
http://www.portaudio.com/docs/proposals/status.html
Start and stop the PortAudio Driver multiple times : wmme: ds: asio: alsa: jack: oss: mac_sm: mac_core: sgi: patest_maxsines.c: How many sine waves can we calculate and play in less than 80% CPU Load : wmme: ds: asio: alsa: jack: oss: mac_sm: mac_core: sgi: patest_mono.c: not yet ported to V19 api: wmme: ds: asio: alsa: jack: oss: mac_sm: mac_core: …
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