Vieira
Hi, 
I have the idea of making a menu where I can manually adjust the sound, for example, control the gain of the background sound, or even the sound effects of the game, but I got confused and I think I do not know how to do ...
This is how I defined the sounds
1
2ALLEGRO_SAMPLE *trilha_sonora= NULL;
3
4ALLEGRO_SAMPLE_INSTANCE *inst_trilha_sonora=NULL;
5
6 trilha_sonora = al_load_sample("trilha_sonora.ogg");
7 inst_trilha_sonora= al_create_sample_instance(trilha_sonora);
8 al_attach_sample_instance_to_mixer(inst_trilha_sonora, al_get_default_mixer());
9 al_set_sample_instance_playmode(inst_trilha_sonora,ALLEGRO_PLAYMODE_LOOP);
10 al_set_sample_instance_gain(inst_trilha_sonora,0.7);
11
12 al_play_sample_instance(inst_trilha_sonora);