set_sound_input_source(3) - Linux man page

Name

set_sound_input_source - Selects the audio input source. Allegro game programming library.

Synopsis

#include <allegro.h>

int set_sound_input_source(int source);

Description

Selects the audio input source. The parameter should be one of the values: 
SOUND_INPUT_MIC
SOUND_INPUT_LINE
SOUND_INPUT_CD

Return Value

The function returns zero on success, or -1 if the hardware does not provide an input select register (ie. you have no control over the input source).

See Also

start_sound_input(3)