Guitar chords

Since 1939 binding sound for pitching musical instruments is in 440Hz frequency. Formerly it was 432Hz.

Drum sounds can't be compononents of a chord. Chords can only consist of certain notes.

There are two type of chords- consonant chords and disonant chords.

Tuning fork is a tool used to pitch musical instruments.

Three crossed turning forks are in Yamaha brand logo.

Laryngologists use tuning forks in 432Hz becouse that's the frequency human body transcribes the best.

There are two types of spectrum analyzers: swept-tuned and time-sequence.

Chord consists of minimum three diffrent notes.

Nowadays there are many kinds of spectrum analyzers: stationary, portable, handhled and networked.

Oscilloscopes are used to observe the change of electrical signal over time.

Use of spectrum analyzer provides a plot and trace of signal amplitude in the frequency domain.

Key attributes of networked spectrum analyzers include the ability of synchronize data captures and effortless free acces.

The first of real time computer games was made for oscilloscope. "Tennis for two" was programmed by William Higinbotham in 1958....

Chords contain tierces (thirds).

In 1897 german physicist K.F.Braun engineered the first oscilloscope.

Following the discovery of fast Fourier transform, in 1962 the first spectrum analyzer was engineered.