Space Invaders Sound System
Looping background track during gameplay
Plays when the player loses all lives
Game start trigger sound
Attract screen / title screen coin insert
Fired when the player shoots
Player ship destroyed
Alternate shooting sound effect
Invader fires a projectile
Step/march tick as invaders move
Invader destroyed explosion
Bomb drop or impact
Mystery ship / UFO flyby
Bonus item collected
Menu selection / button press