Long high pitch scream like noise with low frequency FM and high frequency AM.
It can be the sound of a spaceship shieldgenerator.
A horror sound effect, ascending pitch.
Very strange effect that I can't describe quite well... "Whirlwind of sine waves"
Modulation engine starts and runs.
I can't find better description than a machinegun which shoots bubbles!
An UFO sound effect came from 3 amplitude modulated sine waves.
It sounds like a plunked rubber string. low rate
A soft modulated engine sound effect
Low pitch amplitude modulation of 3 sine wave.
It sound like a plunked rubber ribbon.
This old sound effect is used in my home made game for level up sound effect.