I was blown away the first time I heard Roundabout by Yes.
https://m.From Wikipedia....for you guitar geeks ....
In its original form, the song began with the acoustic guitar, which Howe played on a 1953 Martin 00-18, but the group soon thought a more dramatic opening was needed.[6] This led to Wakeman playing a note on the piano that was recorded and played backwards, creating an effect that Howe described "as if it's rushing towards you". Wakeman played the lowest E note on his grand piano with the E an octave higher which gave it "a fatter feel".[6] Offord recalled a considerable amount of time was spent to get it right in the studio because it involved a lengthy process of picking the right note to use, and editing it correctly.[9] Howe thought the piano added a sense of drama, intensity, and colour to the song.[9] An early idea had the song start with what Anderson described as "something of a Scottish jig" on Howe's acoustic guitar, which he had played to Anderson in their Glasgow hotel room.[6]
Squire played his bass guitar parts with an overdub that was one octave higher using Howe's Gibson ES-150 electric guitar and mixed with his bass track.[9] To complement Squire's playing, Wakeman played arpeggios on his Hammond C3 organ on his right hand while playing Squire's bass parts with his left. For the song's slower section, he plays a Minimoog synthesiser and flute sounds on a Mellotron which he said gave the section a "Strawberry Fields mood".[6] Apart from his acoustic guitar, Howe plays a 1961 electric Gibson ES-5 Switchmaster throughout the song.[6] Anderson noted the music has a "Scottish feel" to it and described the solo part as like a reel, a traditional Scottish country dance.[8] Wakeman's Hammond organ solo was recorded in one take.
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I spent hours rocking and singing this song to her... 
introduced me to so much great music. I remember him being so excited "you gotta hear this, you gotta hear this" and played Roundabout for me. (He was a talented guitarist himself.)
More "gotta hear this" was most of Frank Zappa's catalogue lol.
Hearing this brings him so close to my heart right now. It gives me the idea to make a nostalgic playlist for the little gathering we'll eventually have in his memory
Thanks so much for posting this; it turned out to really mean a lot 
And thank you for sharing that story about your music loving friend.
Soooo much good stuff going on in the music world at that time.
I’m happy that my musings brought you a good memory! If you ever do make that playlist, please share with us!
But that gives me plenty of time to work on it 