Alien Ambient #3

This is a sound created by generating white noise and filtering out everything but even harmonics starting from 100 Hz up to 900 Hz (so the sound is effectively just 100, 200, 400, 600 and 800 Hz). Filter was set to -120dB threshold, effectively muting every other frequency.

It sounds like an alien ambient drone. Feel free to use in your game design however you like. The sound isn't entirely loopable, but 15 seconds should give you a pretty good window in making it nicely loopable, or simply rely on a fact the player won't spend much time in one place where the sound originates from. Please credit me if you decide to use the sound.