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PortAudio: PortAudio API Overview
http://www.portaudio.com/docs/v19-doxydocs/api_overview.html#:~:text=The%20PortAudio%20library%20must%20be%20initialized%20before%20it,number%20and%20Pa_GetVersionText%20%28%29%20to%20get%20a%20string.
an Open-Source Cross-Platform Audio API - PortAudio
PortAudio - an Open-Source Cross-Platform Audio API. PortAudio is a free, cross-platform, open-source , audio I/O library. It lets you write simple audio programs in 'C' or C++ that will compile and run on many platforms including Windows, Macintosh OS X, and Unix (OSS/ALSA). It is intended to promote the exchange of audio software between developers on different platforms.
PortAudio - Audacity Wiki
https://wiki.audacityteam.org/wiki/PortAudio
PortAudio is a cross-platform Audio I/O library used by Audacity. PortAudio development is led by Phil Burk and Ross Bencina, but some of the Audacity developers are major contributors to PortAudio as well. There are two major versions of PortAudio available, of which Audacity uses the more recent v19.
Portaudio: Bindings for the Portaudio portable sound library
https://docs.racket-lang.org/portaudio/index.html
Portaudio itself (both the library and this package) are sample-rate-agnostic, and appear to work just fine for different sample rates. Most of the automated tests on portaudio use the classical "red book" CD sample rate of 44.1KHz, but some Windows audio devices only support 48KHz, and this appears to work fine with Portaudio.
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