set_volume_per_voice(3alleg4)					  Allegro manual				     set_volume_per_voice(3alleg4)

NAME

       set_volume_per_voice - Sets the volume of a voice. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void set_volume_per_voice(int scale);

DESCRIPTION

       By default, Allegro will play a centered sample at half volume on both the left and right channel. A sample panned to the far right or left
       will be played at maximum volume on that channel only. This is done so you can play a single panned sample without distortion. If you  play
       multiple  samples  at  full  volume, the mixing process can result in clipping, a noticeable form of distortion. The more samples, the more
       likely clipping is to occur, and the more clipping, the worse the output will sound.

       If clipping is a problem - or if the output is too quiet - this function can be used to adjust the volume of each voice. You  should  first
       check  that  your speakers are at a reasonable volume, Allegro's global volume is at maximum (see set_volume() below), and any other mixers
       such as the Windows Volume Control are set reasonably. Once you are sure that Allegro's output level is unsuitable  for	your  application,
       use this function to adjust it.

       Each time you increase the parameter by one, the volume of each voice will halve. For example, if you pass 4, you can play up to 16 centred
       samples at maximum volume without distortion.

       If you pass 0 to this function, each centred sample will play at the maximum volume possible without distortion, as will all samples played
       through	a  mono driver. Samples at the extreme left and right will distort if played at full volume. If you wish to play panned samples at
       full volume without distortion, you should pass 1 to this function.  Note: this is different from the function's behaviour in WIPs  3.9.34,
       3.9.35  and 3.9.36. If you used this function under one of these WIPs, you will have to increase your parameter by one to get the same vol-
       ume.

       Note: The default behaviour has changed as of Allegro 4.1.15. If you would like the behaviour of earlier versions of Allegro,  pass  -1	to
       this  function. Allegro will choose a value dependent on the number of voices, so that if you reserve n voices, you can play up to n/2 nor-
       malised samples with centre panning without risking distortion. The exception is when you have  fewer  than  8  voices,	where  the  volume
       remains the same as for 8 voices. Here are the values, dependent on the number of voices:

	  1-8 voices - set_volume_per_voice(2)
	   16 voices - set_volume_per_voice(3)
	   32 voices - set_volume_per_voice(4)
	   64 voices - set_volume_per_voice(5)

       Of  course  this  function  does not override the volume you specify with play_sample() or voice_set_volume(). It simply alters the overall
       output of the program. If you play samples at lower volumes, or if they are not normalised, then you can play more of them without  distor-
       tion.

       It  is  recommended  that you hard-code the parameter into your program, rather than offering it to the user. The user can alter the volume
       with the configuration file instead, or you can provide for this with set_volume().

       To restore volume per voice to its default behaviour, pass 1.

SEE ALSO

       reserve_voices(3alleg4), set_volume(3alleg4), install_sound(3alleg4), detect_digi_driver(3alleg4), detect_midi_driver(3alleg4)

Allegro 							   version 4.4.2				     set_volume_per_voice(3alleg4)