Who was Yello?
I suppose you could do a search for them, it's probably worth it.
Yello was, and still IS as far as I know, a duo of two german/swiss? noise experimenter guys. The met in the late 70's, as they both went to sample noises (on tape, in those days) from a car factory at the same time.
They started making electronic/tape noise based dance music. Their first hit song in the late 70's 'bostich' was one of the first really weird arty-electronic disco hits. Savage Garden pretty much ripped it off for their first single - all the parts that didn't sound exactly like roxette.
They were doing found sound type things with tape manipulation, and later digital sampling, in the 80's. They won more kudos for their videos, I think, than their music. 'I Love You' had this weird video with elastic bands singing like mouths.
The main musical guy, he's more into making realistic sounds on analog synths than sampling things. His breathy brass sounds are incredible.
They had a great psuedo-jazz torch song in the mid-to late 80's with Shirley Bassey singing, called 'The Rythym Divine' - that's worth finding an MP3 of, if possible.
To sum up - weird electonic artist guys, making weird underground music for kicks, with some odd minor hits in the 80's.