read the tutorial but didn't find a good way around this...

sound.cpp

sound.h

so when I call sound.stopbackmusic(1); it just doesnt work, gives me "access violation reading..." and points to "al_stop_sample(bkgid);"

what am I doing wrong here ?

The only work around I can find is to destroy the sample directly.

PS:

simple code in main.cpp

ALLEGRO_SAMPLE_ID * bkgid;
ALLEGRO_SAMPLE *bkg;

bkg=al_load_sample("data/bkg.wav");
al_play_sample(bkg,1.0,0,1.0,ALLEGRO_PLAYMODE_LOOP,bkgid); 
Sleep(1500);
al_stop_sample(bkgid);

tells me that bkgid is not initialized

that....worked !

But how could one know about those default sample_id's ?

anyway this is the correct way to stop a sample ? make it an ID and pass it's address ?

The problem was using a pointer that didn't point to valid memory - it was uninitialized. That's why using an ALLEGRO_SAMPLE_ID on the stack and passing it's address worked.

If you have a timer registered to your event queue, then you won't ever get your ALLEGRO_EVENT_KEY_DOWN event, and it will just skip past those checks. You need to wait in a loop until the event is an ALLEGRO_EVENT_KEY_DOWN event.

void WaitForKeyPress(ALLEGRO_EVENT_QUEUE* queue) {
   while (1) {
      ALLEGRO_EVENT ev;
      al_wait_for_event(queue , &ev);
      if (ev.type == ALLEGRO_EVENT_KEY_DOWN) {break;}
   }
}