Multi-Strings
Most of the multi-stringed guitars I've made have been classical 8-strings. Typically the lower two strings, the 7th and 8th, are tuned down to D and A respectively, but ultimately tuning depends on the key of the music being played.
I've made two 12-string classicals, one with my partner Cyndy Burton. Each has six double courses and is tuned like a 12-string steel string guitar: the first string in each course is tuned to standard guitar tuning (EBGDAE), with the first two courses tuned in unison and the second string in each of the remaining courses tuned an octave higher.
I've also made various steel string harp guitar designs (10-20 strings), featuring 4-6 sub-bases and as many as 8 higher trebles (above the standard high E). The subbasses and treble bank are played open like harp strings, on either side of the standard 6-string fretboard. Examples of these can be viewed under Multi-Strings in the Steel String section.
I've made two 12-string classicals, one with my partner Cyndy Burton. Each has six double courses and is tuned like a 12-string steel string guitar: the first string in each course is tuned to standard guitar tuning (EBGDAE), with the first two courses tuned in unison and the second string in each of the remaining courses tuned an octave higher.
I've also made various steel string harp guitar designs (10-20 strings), featuring 4-6 sub-bases and as many as 8 higher trebles (above the standard high E). The subbasses and treble bank are played open like harp strings, on either side of the standard 6-string fretboard. Examples of these can be viewed under Multi-Strings in the Steel String section.