@Dr-Mark said in S.H.I. Spontaineous Harmonic Improvization:
The way SHI works is to get with the other horn player and agree that whenever someone comes up with a little motif or riff, they share it with the other horn player...
So a year ago, the Jazz Director at the University of Dayton (Willie Morse, an alto sax player) asked me to play a gig with him at this bar in downtown Dayton called Hanna's. He has had me sub with many of his university jazz ensembles, and they were always guaranteed to be an exceptional musical experience with all the fine music majors at UD (Go Flyers!). So of course I said sure.
When I got there 15 minutes before the gig started it was just Willie on stage. So I asked him where the rhythm section was to set up (so I wouldn't get in their way), and he replied: Well buddy, it's just you and me.
I NEVER in my professional career just played with another horn and have no chordal instrument backing me up. A wave of embarrassment and fear passed through me. But then we started, reading through tunes he called out in the Real Books. MAN DID WE COOK! So as you so stated, Dr. Mark, one of us played the lead while the other comped. Like piano or guitar line comping. Then on a wink or nod, the lead line changed and the other person comped. And while the improv soloist was performing, the comping became a bit more subtle. But what I was truly amazed with, was how full the sound was with just two solo instruments playing such a venue.
What an amazing experience this was, with Spontaneous Harmonic Improvization to the MAX. The club owner was so impressed (or cheap 'cause he only had to pay 2 musicians - you be the judge) that he booked the two of us for many more gigs.