Re: Pretentious music??
It was also the Mellotron. That's why I love The Moody Blues. You get out the Mellotron and it's Strawberry Field's Forever . . . there's no sense of realism left.
The other bold instrument that was such a fixture to early prog, and also soul jazz, was the flute. The flute is not a masculine instrument. Plato warned long ago about the seductive dangers of flute music and its ability to make reality disappear.
I was reading on Wikipedia that Tippet had an early jazz band with Elton Dean. The Centipede orchestra was his creation.
Ken Marino Drum Teacher "It's not worth keeping score. You win some. You lose some, you let it go"