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9. SCALE (MODE) SELECT
The SCALE knob selects from one of a dozen pre-programmed scales, or modes. These scales are listed
on a label on the bottom of your Altura MkII for easy reference. We have selected a variety of common
and not-so-common scales, including a couple of pentatonic scales popular with guitarists. We have
also included the Chromatic scale, which includes all twelve notes in the Western scale.
A “scale” is defined by the intervals between adjacent notes as you make your way up an octave from
one root note to the next. The following table describes the interval formulae we used in programming
the Altura MkII. You can change this easily to add your own scale by hacking the open-source software.
See “PROGRAMMING THE ALTURA MkII” on page 25.
MODE
SEMITONES
Ionian (Major)
2
2
1
2
2
2
1
Dorian
2
1
2
2
2
1
2
Phrygian
1
2
2
2
1
2
2
Lydian
2
2
2
1
2
2
1
Mixolydian
2
2
1
2
2
1
2
Aeolian (Natural Minor)
2
1
2
2
1
2
2
Locrian
1
2
2
1
2
2
2
Harmonic Minor
2
1
2
2
1
3
1
Major Pentatonic
2
2
3
2
3
Minor Pentatonic
3
2
2
3
2
Whole Tone
2
2
2
2
2
2
Chromatic
1
1
1
1
1
1
1
1
1
1
1
1
You cannot program non-Western pitches with the Altura MkII. Each key on the piano has its own
standard MIDI number, ranging from 1 – 127. The pitches associated with each is a universal standard.
To detune these frequencies to match non-Western music can only be done inside a synthesizer or
sometimes with intermediate control software.
Содержание ALTURA
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