A sound which was supposed to be an item respawn to replace the original item respawn sound in half-life 1. Sound made with audacity and goldwave, completely artificially generated.
I created a sinusoidal sound of frequency 200 hz and amplitude 0. 4. I played with the sound envelope on the sides and the middle then i repeated it to create a radioactive sound.
Recorded with the microphone of mars gaming headphones. I was trying to create an element of tension to the climate of a short film. I didn't get to use it but hopefully, it can help you.