detect_midi_driver man page on DragonFly

detect_midi_driver man page on DragonFly

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detect_midi_driver(3)		Allegro manual		 detect_midi_driver(3)

NAME
       detect_midi_driver - Detects whether the specified MIDI sound device is
       available. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int detect_midi_driver(int driver_id);

DESCRIPTION
       Detects whether the specified MIDI  sound  device  is  available.  This
       function must be called _before_ install_sound().

RETURN VALUE
       Returns	the  maximum  number of voices that the driver can provide, or
       zero if the hardware is not present.

       There are two special-case return values that you should watch out for:
       if  this	 function returns -1 it is a note-stealing driver (eg. DIGMID)
       that shares voices with the current digital sound  driver,  and	if  it
       returns	0xFFFF it is an external device like an MPU-401 where there is
       no way to determine how many voices are available.

SEE ALSO
       install_sound(3), reserve_voices(3)

Allegro				 version 4.4.2		 detect_midi_driver(3)

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