Led Zeppelin's The Crunge

Led Zeppelin - The Crunge (2014 Remaster) Published on Nov 10, 2014 Raisy Didley

Why would this go up on MATRIXSYNTH considering the site's guidelines? Listen to the full track and then scroll down.

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Did you hear it? If not, listen to the brass parts closely. Note this song was released in 1973, on Houses of the Holy. I was just listening to the album minutes ago, in the background tonight with my wife. She asked me what the synth was. I asked her what synth? She said the brassy parts. I told her I didn't think it was a synth considering the year, and that it must just be muted or processed trumpets. She said it was not trumpets and had to be a synth, or some organ or something. Well, it turns out she was not only right, but it's something I never would have guessed in a million years. I still can't believe it to be honest with you - it's like it's from the bizarro, alternate world of synths. If you don't know, listen closely and see if you can guess it for yourself one more time. Hint: It's not Moog. What is it? You'll find the answer below, and if you were somehow able to identify it based on the character of the synth, you are the Kwisatz Haderach of synth gurus.
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And the answer is....

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via http://en.citizendium.org/wiki/The_Crunge:

"An EMS VCS3, was used to make the strange hornlike parts. These parts were overdubbed separately to create a polyphonic 'brass section.' The song was created mostly live in the studio as an improvisation, to not only reinforce the funk dance feel, but also add structure to the long, repetitive jam. Jones considers this to be one of his favourite Led Zeppelin songs.[5]" John Paul Jones is credited with synths for the part.

EMS SYNTHI/VCS3 brass. Who would have thought? I guess the EMS was even more experimental than we all thought. :)