Fretted instruments set pitch by vibrating string length

Evidence

In the guitar, the string is pressed with a finger against a fret, as shown in the figure, and the distance between the fret and the bridge defines the pitch of the sound. Yet another method to vary the pitch is the dynamic changing of the tension of the string. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 673

Categorization

• XREF: connects to: When a string’s linear density is fixed, pitch is varied by tension and length — David Howard, Jamie Angus, coustics and Psychoacoustics, 1093