The only condition for free use is a credit line. Personal YouTube videos and streams are free even if monetized (promoting a company or paid client work needs a license).
A siren with silence built in for a moderate sense of tension, with light reverb added. Trim the silence to tighten the interval between blasts for a more urgent feel.
Good for a moment when an intrusion is discovered, or to scare off a car thief. It is an mp3 but loops cleanly as-is.
