I'm working my way through The Complete Bitches Brew Sessions. On four of the outtakes, Great Expectations, Orange Lady, Yaphet, and Corrado, the band includes sitar and tabla or tamboura and on Lonely Fire and Guinnevere (the David Crosby song), sitar. I wasn't expecting that.
The liner notes suggest Corrado is a blues-like drone.
Wikipedia on producer Teo Macero's role on the recording:
Some might argue Teo Macero deserves much of the credit for Bitches Brew. His contributions were sometimes controversial, certainly important, and perhaps invaluable.
There was significant editing done to the recorded music. Short sections were spliced together to create longer pieces, and various effects were applied to the recordings.
And I never heard this connection before:
Davis's later forays into electric fusion, such as In a Silent Way, Bitches Brew, and A Tribute to Jack Johnson, were highlighted by Macero's innovative mixing and editing techniques. These were inspired partially by Macero's association with influential avant-garde composer Edgard Varèse, one of the innovators of taped electronic music.
The track also has Miles as a whispery crank at the beginning:
Teo: Ok, is this going to be part two?
Miles: It's going to be part nine. What difference does it make?
Teo: Alright, alright. Here we go, standby. This is part something.