save_sample (3) - Linux Manuals
save_sample: Writes a sample into a file. Allegro game programming library.
NAME
save_sample - Writes a sample into a file. Allegro game programming library.SYNOPSIS
#include <allegro.h>
int save_sample(const char *filename, SAMPLE *spl);
DESCRIPTION
Writes a sample into a file. The output format is determined from the filename extension. At present Allegro does not natively support the writing of any sample formats, so you must register a custom saver routine with register_sample_file_type(). Example:
if (save_sample("sound.wav", sample) != 0)
abort_on_error("Couldn't save sample!");