The basics of sound and note frequencies will be explained on this page, together with some particular effects that can be used on guitar as well as on other instruments.
Scales and frequency ratios
Multiphonics, unison bends & Tartini tones
Fig. 1: MIDI pitch in function of frequency.
Note names are shown in the plot.
Fig. 2: MIDI pitch in function of frequency,
with X-axis in logarithmic scale.
Fig. 3: Comparison between the just, western and pythagorean scale frequencies.
Eq. 1: Frequency from MIDI pitch
Eq. 2: Note frequency relative to A4 (440 Hz)
Eq. 3: MIDI pitch from frequency
Eq. 4: Fundamental frequency of string vibration
x: MIDI pitch
n: number of semitones above (+) or below (-) A4
T: string tension
m: string mass
L: string length