Reasons NOT To Get a Chromatic
Instruments- discuss specific features, luthiers, instrument problems & questions
I think of diatonic and chromatic dulcimers as two roads that lead to different kinds of attractions along the way. One will mainly take you to traditional music, both modal and pentatonic, and the other leads you to pop, blues, and jazz. Both can cross over a little bit, but they have different emphases.
Of course, I mainly play a dulcimer with 6+ and 1+ frets, so I've chosen a kind of middle path. I play mostly diatonic music but can occasionally add blue notes or switch keys in ways that would be much more difficult on a truly diatonic instrument.
I would like to caution us all not to assume generalizations hold for everyone. I played the guitar, mandolin, and ukulele before discovering the dulcimer, and the diatonic fretboard did not make the instrument easier to learn. On the contrary, the fact that I could not play so many of the songs in my head was very frustrating. It took about 2 years of playing everyday for me to get a sense of what melodies could be found on the diatonic fretboard and what couldn't. (It may be true that there are no wrong notes on the dulcimer, but that doesn't mean that all the right ones are there!)
And chording on the diatonic fretboard is more complex. On a chromatic fretboard, a chord shape will be the same type of chord as you move up and down the fretboard, but on a diatonic dulcimer, that chord shape changes between major and minor. That fact significantly slows down the development of dulcimer players who wish to play chords.