Learn to play the melody if you haven't already done so. The transcription in the Omnibook is 3 pages, 24 staves & Parker is riffing on the melody all the way, doubling notes, adding fills, playing over the bar ... Great if you can play that way but, I can't usually solo on bass like a reed player, especially if that's what I hear in my head. FWIW, Jaco played Donna Lee as a performance piece, not a spontaneous exchange with musician's on a stage! He probably could have but he didn't.
What I hear in my head is my trusted Music Tutor, Dan, saying; "Simplify, simplify". Write out the changes 4 measures to a line. Notice the 1st chord on each line. This is a 16 bar blues with many substitutions. Look at Parker's accidentals & notice how few are tonic to the chord. He is going so fast they all sound like approach notes. Play it as a ballad & you are bound to hate it! So relax & start playing simple ii/V patterns (seen Aebersold Vol 3?) over the chromatic changes until you begin to hear simple melodies in your head. Transcribe & practice those short melodies so they just flow out of your hands as muscle melody. BTW, this takes more than a few weeks.
The transition from baseline to solo is the beast, so play a variation on the bassline you've been locked into, for the 1st 8 bars or more. Transition into a simple melody like an enclosure (e.g., III, V, IV) & a rest that covers 2 bars. Build on that for a chorus or more & simplify the harmonic tempo of your playing as you go into the last A so that you can play a bassline for the last 2 bars of your last chorus. FWIW, I've ben working on this for years with mixed but ever improving results. Structure in a solo is harder, for me, than building with Lego's, Tinker Toys, Erector Sets or molecules. (I've tried all 4, also with mixed results. lol)
The concept is a simple enough. You already know doing anything like that above 180 ain't easy. So expect to screw up & use those wonderful episodes to learn to play through your mistakes. You can even learn to repeat the mistake to suggest you did that on purpose! It's an old Be-Bop trick that still works.
Deal with 1st things 1st. How will you transition from Bassline to something more melodic. How will you transition from melodic to bassline so the band knows you're done 'cause, if you're like me, you ain't gonna look up from the fretboard to give some visual cue. At least, not this month.
I use Band In A Box to practice tunes like this. It's a quirky relic of a program but is gets the job done & entering the changes is butt simple. Once upon a time, there was a BIAB OmniBook file set in the Yahoo Groups BIAB Files section but, the music industry forced it's removal as their way of fostering our growth & insuring great music will be played for millenia to come. (oww, tongue in cheek, I bit my tongue).
Now the hard part. Go find a bunch of musician's who can play this s**t. That's real fun!
Hope that helps,
