MARIMBAS
Log Drums
NOT LIVE
Brief Overview of 12Tone Equal Tempered
Our Western music system utilizes the mathematicallyderived 12tone equal tempered or chromatic system which yields 12notes between the octaves. There are familiar elements in this system:

A letter has been assigned to each of the 12 tones along with a system of sharps and flats (e.g. C, C#, D, D#, E, F, F#, G, G#, A, A#, and B) which is derived from the layout of the piano keyboard.

White keys represent the naturals (C, D, E. F, G, A, B).

Black keys represent the accidentals C#, D#, F#, G#, A#).

The equaltempered construct means that the notetonote relationship is such that a composition or song can be transposed and be equally performed in any of the twelve keys. "Transposing" is the basic magic of the 12tone equal system.

In 12tone equal, the interval relationships (seconds, third, fourths, fifths, sixths, and sevenths) are always the same relationship regardless of the tonic key a song is composed in.
Scale Technical Definition: 12Tone Equal Tempered

Octave determined by the 12th root of 2 factor = 1.059463

Number of notes per octave = 12

Number of cents per octave = 1200

Number of cents between notes = 100 (1200/12)
Brief Overview of Non12Equal
Non12 equal tempered scales function the exact same way as 12tone equal, but their number of notes per octave is different. This leads to different audible distances between neighboring notes creating the character of the scale. The 5tone equal and 7tone equal marimbas are representations of the non12 system.
Non12 equal scales don't utilize letters for pitches, instead they use numbers.

Each marimba (below) has a twooctave range.

Their lowest or starting pitch is Tenor C (C3)  notated as "1".

Their middle (1) pitch is middle C (C4)

Their highest pitch is treble C (C5)
5Tone Equal Tempered
Model C311ET5
2Octave / 5tone equaltempered scale
No. of Notes: 11
Range: Tenor C (C3) to Treble C (C5)
Bars: African Padauk
Resonator: Poplar
Finish: Semigloss clear coat, waterbase
Dimensions: 29 L x 16" D x 131/2" H
Weight: 17lbs.
Pair of yarnwound mallets
$385 (Plus packaging and shipping)
Scale Technical Definition: 5Tone Equal

Octave determined by the 5th root of 2 factor = 1.1486958

Number of notes per octave = 5

Number of cents per octave = 1200

Number of cents between notes = 240 (1200/5)
Scale Character
Two note intervals with x no. of notes in between
On the Drawing Board  Other Non12 Equal Tempered Scales
The following scales are in design. Once constructed, they will be posted to this website.

8Tone Equal (has 17 notes)

9Tone Equal (has 19 notes)

10Tone Equal (has 21 notes)

11Tone Equal (has 23 notes)

13Tone Equal (has 27 notes)
It is interesting to note that the 12Tone Equal Tempered scale actually contains five equaltempered scales within it. This is easily determined because the number 12 can be equally divided in five ways, as follows:

2Tone Equal (based on the flatted 5th or Tritone)  C, F#, C

3Tone Equal (based on major 3rds)  C, E, G#, C

4Tone Equal (based on minor 3rds)  C, D#, F#, A, C

6Tone Equal (based on the 2nd or wholetone steps)  C, D, E, F#, G#, A#, C

12Tone Equal (based on halfsteps)  C, C#, D, D#, E, F, F#, G, G#, A, A#, B, C