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Portaudio: Bindings for the Portaudio portable sound library
https://docs.racket-lang.org/portaudio/index.html#:~:text=Most%20of%20the%20automated%20tests%20on%20portaudio%20use,and%20this%20appears%20to%20work%20fine%20with%20Portaudio.
How to change pitch (sample rate) at run-time with …
https://stackoverflow.com/questions/21046430/how-to-change-pitch-sample-rate-at-run-time-with-portaudio
Resampling is not a capability of PortAudio. Like the native audio i/o APIs that PortAudio wraps, PA streams run at a constant sample rate. To change the pitch (playback rate) of a sample you need perform on the fly sample rate conversion. You can do this by interpolating the original signal using a phase index that increments at some non-unity rate.
PortAudio: Enumerating and Querying PortAudio Devices
http://www.portaudio.com/docs/v19-doxydocs/querying_devices.html
This is because some devices support ranges of sample rates, others support, a list of sample rates, and still others support some sample rates and number of channels combinations but not others. To get around this, PortAudio offers a function for …
PortAudio - an Open-Source Cross-Platform Audio API
http://www.portaudio.com/faq.html
PortAudio will use whatever sample rates are available on the host. PortAudio does not provide any additional sample rate conversion capability. If you need a sample rate that is not available then you might want to use the SRC (Sample Rate Conversion) library by Eric de Castro Lopo. Brought to you by the PortAudio community.
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