C7 arpeggio for gypsy jazz
The C7 arpeggio is built from the notes C (R), E (3), G (5), A# (♭7). On Haute Gitanerie you can see it across the whole guitar neck — contained position boxes, long diagonal forms, and its parent scale (C Phrygian dominant) — with note names in English (C D E) or solfège (Do Ré Mi), and audio playback.
How to practise the C7 arpeggio
Start with a contained position box near the low strings, then move it up the neck fret by fret, or follow a diagonal form for a two-octave sweep in the manouche style. Every note is labelled with its interval (R, 3, 5, ♭7), so you always know where the root, third, fifth and seventh sit.