what is the notable feature of the tuning mentioned ?
It packs the chromatic scale onto four consecutive frets of three consecutive strings.
Ralph Patt
Major-thirds tuning packs the chromatic scale (the consecutive twelve-notes of the octave) onto four consecutive frets of three consecutive strings, an arrangement that reduces the extensions of the little and index fingers
who is ralph patt? He was an American jazz-guitarist who introduced major-thirds tuning.
wiki:18461266
Ralph Patt [SEP] Major-thirds tuning
Patt was inspired by the jazz of Ornette Coleman and John Coltrane and the atonal music of Schoenberg. Seeking a guitar-tuning that would facilitate improvisation, he introduced major-thirds tuning by 1964, perhaps in 1963. Patt's tuning is a regular tuning in the sense that all of the intervals between its successive open strings are major thirds; in contrast, the standard guitar-tuning has one major-third amid four fourths. Patt used major-thirds tuning during all of his work as a session musician after 1965 in New York. Major-thirds tuning packs the chromatic scale (the consecutive twelve-notes of the octave) onto four consecutive frets of three consecutive strings, an arrangement that reduces the extensions of the little and index fingers ("hand stretching").