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Saturday, 23 April 2011

Frequencies 23.4.11

[Under construction]

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.

Sound

Scales and frequency ratios

Harmonics

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

f: frequency
x: MIDI pitch
n: number of semitones above (+) or below (-) A4
T: string tension
m: string mass
L: string length

5 Bart Rogiers: Frequencies [Under construction] The basics of sound and note frequencies will be explained on this page, together with some particular effects th...