I'm making a mission where I need to play sounds. I need only one to be played at the same time. Meaning that if a second sound plays 0.1 sec after the first sound, the first should stop. Right now, there is no commands to control sounds in any way, so you can only play the entire sound.

I'd suggest some commands to create sounds, play sounds and stop sounds. Like:

_sound = createSound "SoundThatLastsThreeSeconds";
playSound _sound;
sleep 1;
stopSound _sound;