🚀 go-pugleaf

I keep hearing references to "comb filters" in reference to both video
and to audio. What are they?

Part two of the question: some years ago, I read an interview with someone
at Atari, who said that they had a new video game that used comb filters
to remove phase information from sound output, which removed directional
cues that the human ear/brain uses, so that the sound from this arcadge
game seemed to be coming from all directions at once, rather than sounding
like it came right out of the speaker. This seemed odd but interesting...
can anyone shed any light on this?  Is this something I could do with
digitized sound on, e.g. an Amiga?

Sorry to post to both groups separately but cross posting doesn't work here.
	Doug Merritt		ucbvax!unisoft!certes!doug
				("reply" doesn't work, so mail to the above)