al_save_sample_f
bool al_save_sample_f(ALLEGRO_FILE *fp, const char *ident, ALLEGRO_SAMPLE *spl)
Writes a sample into a ALLEGRO_FILE filestream. Currently, wav is the only supported format, and the extension must be '.wav'.
Returns true on success, false on error. The file remains open afterwards.
Note: the allegro_audio library does not support any audio file formats by default. You must use the allegro_acodec addon, or register your own format handler.
See also: al_save_sample, al_register_sample_saver_f, al_init_acodec_addon