read_sound_input - Retrieves the last recorded audio buffer. Allegro game programming library.

       Retrieves  the  most  recently  recorded audio buffer into the specified location. The buffer size can be
       obtained by checking the return value from start_sound_input(). You must be sure to call this function at
       regular intervals during the recording (typically around 100 times a second), or some data will be  lost.
       If  you  are  unable  to do this often enough from the mainline code, use the digi_recorder() callback to
       store the waveform into a larger buffer of your own.

       Note: many cards produce a click or popping sound when switching between record and playback modes, so it
       is often a good idea to discard the first buffer after you start a  recording.  The  waveform  is  always
       stored in unsigned format, with stereo data consisting of alternate left/right samples.

       read_sound_input - Retrieves the last recorded audio buffer. Allegro game programming library.

       The  function  will  return  non-zero if a buffer has been copied or zero if no new data is yet available
       (you were too fast checking the input).

start_sound_input(3alleg4)

Allegro                                           version 4.4.3                        read_sound_input(3alleg4)

#include<allegro.h>intread_sound_input(void*buffer);