For the final version of Plain Notation System please go to: **Plain Notation System**

The idea is plain and simple. In 12-TET there are 12 tones that have their names as follows:

**Do, Bu, Re, Na, Mi, Fa, Ge, So, Vu, Le, Ha, Ti**

The tones are designated according to the first consonant letter of their corresponding names:

**D, B, R, N, M, F, G, S, V, L, H, T**

In use are four clefs corresponding to the tones So, Do, Re and Fa and derived from their respective Greek letters σ, ∂, ρ, and φ.

The intervals in the Plain Notation System are also straight forward as follows:

- zero interval means – unison
- the smallest interval – first
*(prime)* - second
- third
- fourth
- fifth
- sixth
- seventh
- octave
*(eight)* - ninth
- tenth
- eleventh
- renova
*(anew, again)* - refirst
- resecond
- rethird
- … and so on

The inversions of the intervals obey the formula: Ia + a = 12 *(Ia is the inversion of a)*

The chords are represented by their root *(base)* tone and numbers for the intervals between the steps of the chord or its inversion. Please see the next illustration:

See also: Treatise on Pentatonics (YouTube Videos)