Sound

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Level	I	II	III	IV		V
Sound spectrum	A O	L A	I	I	H
			E	E	A
		O	A	æ	G
				A	F
	U M	U M N	O	O	E
			U	w	D
				U	C

The information of music or speech is independent of the rate (tempo) and of the reference frequency (octave, clef, voice pitch). The speech sounds (phonemes) and the musical chords differ by a ratio of theirs frequencies. The musical melodies differ by the ratio of tones and by the ratio of note values (durations).

Music is the universal language without the conventional symbols. The musical perception is limited by ability to distinguish the ratios of tones (intervals). Here are the distinguishing levels or the scales:

Number of tones	Scale	Genre
2,3	–	Signalization etc.
5	Pentatonic	Folk, pop, rock
7	Diatonic
12	Chromatic	Classical, jazz

The vowels correspond to the tones. The table below schematically shows the spectrum of the sound harmonics (integer multiples of frequency), which are grouped into the formants. The relative frequencies are denoted by colors of the visible spectrum. The relative energy level is shown by the color intensity.

Sound	Fundamental frequency	Formants (harmonic groups)					Pronunciation
		1	2		3
I							Smile. Amplification of the boundary frequencies, especially the high band.
E
A							Throat sound. Uniform spectrum.
O							Puckered lips. Amplification of the boundary frequencies, especially the low band.
U

First two formants are necessary and sufficient to recognize any sound exactly. Third formant is strong in the beautiful singing voices, and it shapes the symmetrical cross in the given table.

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