Matterhorn Project were the Swiss duo of PJ and Stella Wassermann. They started making really weird kids/novelty electronic disco music in the 80s and seemed to still be active just a few years ago. Sadly, Stella passed in April of this year. Check the link at the bottom of the post to hear some of her solo material.
The Matterhorn jams all feature pitch-shifted vocals and animal SFX. "The Gnomes Of Zurich" is a favorite. Really reminds of Supersempfft. Albums and singles are around, or can be purchased via CDBaby. Prices for original vinyl aren't outrageous on Discogs or eBay.
From the official site:
"MUH!" (also known as the "moo song" in South Africa, Japan and other parts of the world and the French call it "meuh" or "meu") by Matterhorn Project is unique in pop history. There are cows singing and bells tingling, yodelling and alpine horns, all supported by an infectious eigthies disco-beat and a slightly spaced-out sense of humour. The track stormed the Swiss and international charts in 1985 and got known and loved for its sense of comedy and tongue-in-cheek citing of Swiss clichés.
And on the "Muh" video:
The funny MUH! video clip has been created in 1986 by a student of a German movie academy (unfortunately we can't remember his name).
This clip has been crafted manually, there was no computer animation at that time and every single picture (25 per second) had to be drawn by hand. That's why the video has some lengths but it's very charming and humorous and shows very well the atmosphere of the Swiss mountains although the clothes are more Bavarian than Swiss alpine.
Additionally the video author has added an erotic component to the video story that's not part of the original song. That's why they now say at YouTube that "This video may not be suitable for minors". But it's really not that baaaad - judge for yourself and have fun!
Somewhat detailed bio found on the same site:
Hear some nice new age music at Stella's official site.