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CL-PortAudio references - GitHub Pages
https://filonenko-mikhail.github.io/cl-portaudio/#:~:text=PortAudio%20supports%20audio%20input%20and%20output%20in%20a,the%20formats%20supported%20by%20the%20native%20audio%20API.
c++ - How to know the frequency of the portaudio sample ...
https://stackoverflow.com/questions/19099202/how-to-know-the-frequency-of-the-portaudio-sample-test-sinewave-code
A quick look suggests SAMPLE_RATE / TABLE_SIZE will give you you the cycles per second for the sine wave, which appears to work out to be ~220Hz, which is an A3 note. Though from the code I can see the left channel is getting this wave and the right channel is stepping through the table at 2.75x the base rate which I guess would be about 606Hz which doesn't hit …
CL-PortAudio references - GitHub Pages
https://filonenko-mikhail.github.io/cl-portaudio/
PortAudio supports audio input and output in a variety of sample formats: 8, 16, 24 and 32 bit integer formats and 32 bit floating point, irrespective …
PortAudio: portaudio.h File Reference
http://files.portaudio.com/docs/v19-doxydocs/portaudio_8h.html
PortAudio anticipates that each callback invocation may execute for a duration approaching the duration of frameCount audio frames at the stream sample rate. It is reasonable to expect to be able to utilise 70% or more of the available CPU time in the PortAudio callback. ... The size in bytes of a single sample in the specified format, or ...
PortAudio – an Open Source Cross Platform Audio API
https://www.ee.columbia.edu/~mim/meap/paMat/portaudio_v18_1/docs/portaudio_icmc2001.pdf
A PortAudio implementation manages buffers internally and requests audio processing from the client application via a callback that is associated with a stream when it is opened. A variety of sample formats are supported by PortAudio including 16 and 32 bit integer and 32 bit floating point. Where necessary PortAudio manages conversion between
PyAudio Documentation — PyAudio 0.2.11 documentation
https://people.csail.mit.edu/hubert/pyaudio/docs/
Returns PortAudio version as a text string. Return type: string pyaudio.get_sample_size(format) ¶ Returns the size (in bytes) for the specified sample format. pyaudio.paAL = 9 ¶ Open Audio Library pyaudio.paALSA = 8 ¶ Advanced Linux Sound Architecture (Linux only) pyaudio.paASIO = 3 ¶ Steinberg Audio Stream Input/Output pyaudio.paAbort = 2 ¶
PortAudio: Example programs demonstrating PortAudio …
http://portaudio.com/docs/v19-doxydocs/group__examples__src.html
Provides an example of how to post stuff to/from the audio callback using lock-free FIFOs implemented by the PA ringbuffer. file. paex_pink.c. Generate Pink Noise using Gardner method. file. paex_read_write_wire.c. Tests full duplex blocking I/O by passing input straight to …
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.
https://portaudio.music.columbia.narkive.com/yt9bbMHR/choosing-framesperbuffer-values
choose a good framesPerBuffer value. My current approach is to divide. the sample rate by the desired callback frequency (e.g. 48000 Hz. sample rate / 200 Hz callbacks = 240 frames per buffer). I don't know of a satisfactory heuristic that is guaranteed to be. optimal. It depends on the host API *and* the drivers.
python - What are chunks, samples and frames when …
https://stackoverflow.com/questions/35970282/what-are-chunks-samples-and-frames-when-using-pyaudio
Size of each sample is 2 bytes, calculated using the function: pyaudio.get_sample_size (pyaudio.paInt16). Therefore size of each frame is 4 bytes. In the "frames" list, size of each element must be 1024*4 bytes, …
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