Dub Siren (Reggea Dub) by Davd

Siren dub reggea crave

Square vco modulated by square-shape LFO for a blipping tremolo-like effect (for a "clock-alarm")
Pitch controlled by Triangle LFO more or less send by the VC MIX

Switch VCA MODE "ON"
Play with OSC MODE for more or less tremolo
Play with VC MIX for more or less pitch modulation
Play with LFO RATE for modulation speed

Combine with a reverb/delay of course ! (Space Echo RE20 in the audio preview)