I'm glad to announce that I found an Easter egg in beta 8!!! Haha not really but here is the trick:
Use delay on any machine
Place a pattern in the sequencer or directly compose inside of it
When the sequence is finished, put a pattern with nothing on it so the song doesn't stop, and you'll hear the delay continue.
NOW use the "changing tempo" feature (check the caustic file) and if you have set the delay's feedback high enough, you're supposed to hear the "polyphonic glide" effect!!!
Ok this is more like a glitch, it crackles and everything but I find it pretty cool :)
Hope you'll enjoy it, also pardon my English!
(If anybody posted a similar discover I'm sorry!)