Portaudio Callback Function

PortAudio: PortAudio Tutorials

http://files.portaudio.com/docs/v19-doxydocs/tutorial_start.html#:~:text=%20Below%20are%20the%20steps%20to%20writing%20a,repeatedly%20by%20PA%20in%20the%20background.%20More%20

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PortAudio: Writing a Callback Function

http://www.portaudio.com/docs/v19-doxydocs/writing_a_callback.html

c++ - Portaudio Callback Function Example - Stack Overflow

https://stackoverflow.com/questions/26172522/portaudio-callback-function-example

PortAudio Tutorial - Columbia University

https://www.ee.columbia.edu/~mim/meap/paMat/portaudio_v18_1/docs/pa_tut_callback.html

It is a function that is called by the PortAudio engine whenever it has captured audio data, or when it needs more audio data for output. Your callback function is often called by an interrupt, or low level process so you should not do any complex system activities like allocating memory, or reading or writing files, or printf().

PortAudio - an Open-Source Cross-Platform Audio API

http://portaudio.com/

PortAudio: Utility Functions

http://files.portaudio.com/docs/v19-doxydocs/utility_functions.html

PortAudio: Blocking Read/Write Functions

http://portaudio.com/docs/v19-doxydocs/blocking_read_write.html