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  • David Dornig

31-Tone Guitars

On the 31-tone guitar, the octave is divided into 31 frets on the fretboard.

This 31-tone six-string semi-hollow electric guitar was Dornig's first 31-tone guitar.

This guitar has a scale length of 648 mm with 31 frets in the octave and 45 frets in total. The distance from the saddle to the first fret is 14.328mm and from the 44th to the 45th fret is 5.357mm.

The guitar is tuned in 31 equally tempered fourths ( 2^(13/31) = 503.2258c ): E, A, d g c' and f' and has a fretted range of about 3 1/2 octaves.

The eight-string 31-tone guitar-bass with 67 frets has a range from E,, to f''’, i.e. that of a 4-string bass and a 25-fret guitar in standard tuning.

In order to make practical use of this range while still maintaining fourths-tuning, a partial capo divides the scale-length (673 mm from capo) so that the resulting tuning is E,, A,, D, (capo 5th fret) A, d g c' and f'.

The eight-string classical 31-tone guitar has a scale-length of 670mm.

For the composition Ansel Drosse it is tuned to 431 Hz in E,, A,, E, A, d g c' f' tuning.

It is usually strung with synthetic gut strings.

The 31-tone electric bass was built by Jon Catler and reworked by a guitar builder in Vienna.

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