You should use the [Genre] field to add a new "Fusion Musician" Genre, not set up a new [Fusion Musician] field.
You could even add Guitar, Bass, Drums, etc. to Keywords, or set up sub-Genres for them, all without creating new fields.
I may not have been clear about my intention for that field Roderick. (and I am already using Genre for Fusion, Jazz etc to describe the music)
It is not to identify a certain Soloist as a "Fusion Musician", but rather to be used exclusively for Fusion Musicians in the same way as I would prefer to keep Soloists strictly for Classical musicians (and it's already a fairly long list with a small slider as a result). So I would would have in the Fusion Musician field:
Stanley Clarke; George Duke; Ray Gomez; etc
and in Instrument:
Bass; Keyboards; Electric Guitar; etc
It is meant to be a general piece of info to identify which albums what musos played on. To get the real nitty gritty of who played which particular kind of bass on which track I already have looked up Wikipedia and Discogs and copied the info in the Musicians field that I created (for non-Classical only), and for those musos listed above that info looks like this (just a cut and paste from the website):
Stanley Clarke – electric bass guitar (1,3,5,6), vocals (1,6), handbells (1), acoustic piano (2,3), piccolo bass guitar (2,3,6), humming (3), acoustic bass (4,6), gong (6), chimes (06), arranger, conductor, producer
George Duke – keyboards (6)
Ray Gomez – electric guitar (1,3,5), rhythm guitar (3)
Icarus Johnson – acoustic guitar (6), electric guitar (6)
John McLaughlin – acoustic guitar (4)
David Sancious – keyboards (1), Minimoog (2,3), organ (3), electric guitar (5)
Gerry Brown – drums (1,3), handbells (1)
Billy Cobham – drums (6), Moog 1500 (6)
Steve Gadd – drums (2,5)
Milt Holland – percussion (3), triangle (4)
Trombone - Tom Malone & Dave Taylor
Trumpet - Jon Faddis, Alan Rubin & Lew Soloff
Horns - Earl Chapin, John Clark, Peter Gordon & Wilmer Wise
Brass - Al Aarons, Stewart Blumberg, George Bohanon, Buddy Childers, Robert Findley, Gary Grant, Lew McCreary, Jack Nimitz, William Peterson, Dalton Smith
Strings - Marilyn Baker, Thomas Buffum, David Campbell, Rollice Dale, Robert Dubow, Janice Gower, Karen Jones, Dennis Karmazyn, Gordon Marron, Lya Stern, Ron Strauss, Marcia Van Dyke & John WittenbergAbsolutely ZERO chance of me entering the data for each track! It will only be for the main band too - silly to enter all those String players names when they might be on one or two tracks. In the example above I would cut off at Milt Holland.
The problem with using Instrument for the above is that currently Bass means Bass voice - I suppose I could change singers to Basso....hmmmm.