Artificial harmonics
REFERENCE — the harder cousin of natural-harmonics. Genuinely advanced, and out of scope for
performing at this stage.
What makes it different
A natural harmonic touches an open string — the fundamental never changes, so the same three touch-points always give the same three intervals. An artificial harmonic starts from a stopped note: one finger (usually the 1st) presses the string down firmly to set a new fundamental, while the 4th finger lightly touches a perfect fourth above it. The sounding pitch is two octaves above the pressed note — the same 4th-partial relationship as the two-octave natural harmonic in the last lesson, just built on a movable fundamental instead of an open string.
Stage 3's harmonics-on-the-page already showed you how this looks written down: two
noteheads on one stem, a normal oval where the 1st finger presses, a diamond a fourth above it
where the 4th finger touches.
Why it's genuinely hard
Because the fundamental keeps changing with every new stopped note, the node position has to be relearned for every single pitch — there's no fixed landmark the way the open-string harmonics have. Both fingers also have to move together, in a fixed fourth-apart frame, while one presses firmly and the other stays feather-light — two completely different amounts of pressure, in the same hand, at the same time.
Where it belongs
This is repertoire-module technique — you'll meet it if a specific piece calls for it, well past this course's Intermediate-gate scope. Know what it is and how it's built; producing it reliably is a later project.