D# Spanish on Guitarrón
Every D# Spanish note across 6 strings, roots flagged, read as bass material.
D# Spanish runs 7 notes to the octave. Below it is mapped onto this instrument's A–D–G–C–E–A fingerboard with every D# marked, because what a player needs mid-number is not the pattern but where the root is when the harmony moves under it.
Fiery and exotic — the b2 presses against the root while the major 3rd keeps it from sounding plainly minor. Flamenco heat with a Middle-Eastern edge: dramatic, urgent, and passionate.
Heard in: Flamenco and Spanish classical guitar, klezmer and "Hava Nagila", Arabic and Jewish liturgical music, metal riffs, and the V chord of harmonic minor.
The bass takes almost no melodic line, and that is precisely why these matter: the notes between one root and the next come out of a scale, and an approach that lands wrong is the loudest wrong note in the ensemble.
Take it slowly against the playback until the geometry stops being geometry, then put it under a number in Eb and let the written line pick its own notes out of it.