When I was young, playing Xenon 1, I kept telling my brothers that in the meteors noise (level 3), I was hearing lost in the noise a small music, like bells. They claimed they didn't hear anything.
The music consists of 4 notes repeating about every 3 seconds.
Years later I wondered if I was crazy and recorded it, I can still hear them (although one of my ears seems to have suffered from ACDC shows

Can you hear them ?
http://mercenarysite.free.fr/oric/xenon ... oteurs.wav
If you can't, here's the same sample, hyper-filtered with noise reduction and other ones, so you can hear more or less what the notes are:
http://mercenarysite.free.fr/oric/xenon ... iltres.wav
Now I'm wondering how these notes are there... Never really dug the subject further, not sure if this is specific to Xenon or the the Oric white noise generation.