@roxy54, Bruce Botnick was the recording engineer on the doors (I’m spelling it as they did---with a lower case d, as homage to e e Cummings, I believe. Yes, Morrison was a tad pretentious ;-) albums. They had a number of different bass players on their recordings, including Larry Knechtel (The Wrecking Crew) and guitarist Lonnie Mack.
I twice saw the doors live, and ’cause my momma taught me to not speak ill of the dead (though I above made an exception for Morrison), I won’t say anything about Manzarek. ;-) . Let me just add that Jerry Garcia also didn't care for the doors.