Hi, I’ve been an Allan Holdsworth fan for almost two decades. I especially dig his SynthAxe stuff, tracks like Distance vs Desire, Against the Clock, Secrets, Eidolon etc. I figured out some licks in fifths tuning which Allan often used playing SynthAxe. The fifths tuning is achievable on a hexaphonic guitar system with one of Roland guitar synths.
Eidolon is my favourite, I transcribed the solo many years ago — I mean I just wrote down all the notes, but I’m not quite sure about the fingerings. Allan seems to be using standard tuning here, but some phrases seem to be difficult/impossible to execute at that speed. For instance, check out the Bb major arpeggio, followed by Ab arpeggio at 2:25 in the video below. How did he play that? Very enigmatic.
I wonder if anyone tried to learn his SynthAxe tunes and solos (I’m not talking about Allan’s guitar stuff here), and understand the logic and fingerings behind them. Google search gives surprisingly few results about this.