3 & 4 String Dulcimers
3 String Dulcimer
There are a lot of different tunings but these 2 are the most common.
Beginners
use this.
D (Thick Bass String) - A - A
After
a beginner advances they use this.
D (Thick Bass String) - A -
D
Tuned like a Strumstick.
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4 String Dulcimer
Tuning
used most of the time.
D (Thick Bass String) - A - D - D (High
Skinny String)
This tuning is just the same as you use for 3-string "D-A-D," with the doubled melody string "opened" into two separate strings.
Other
Tunings
From low to high string.
D Ionian (D-A-A) D
Mixolydian (D-A-D)
D Dorian (D-A-G)
D Aeolian (D-A-C)
four individual strings, rather than just "melody," "middle," and "bass" strings.
Dulcimer Builders also make 6-String Dulcimers and Hammer Dulcimers.