I've been publishing my harmony arrangements of traditional music arranged for strings since around 2013 (although I had been creating them for a lot longer - I've been playing harmonies for pretty much as long as I've been able to play an instrument at all!)
I now have a library of over 150 tune arrangements, which are sold as single pieces or as discounted multipacks.
These days, the scores come in a consolidated format: there are three quartet scores (standard string quartet, or three violins and cello, or three violins and viola) which all come with individual parts, and they have chord symbols for accompanists. They are designed to be used flexibly by groups that might range from a fiddle duet up to a string orchestra, and the harmony parts are "building blocks" for groups to use creatively in creating their own arrangements.
However, the very first three collections I made started out as fiddle trios/duets, with the cello parts being added later in order to make my whole collection consistent. So the recordings I made for these sound a little different to my later arrangements.
Celtic Fiddle Harmony Sheet Music Multipack 1

[Listen to audio demos] [Buy sheet music]
Here I recorded the melodies on their own, then with one harmony part, then with the other harmony part, and finally with both harmony parts, to demonstrate what was possible to build as an arrangement. I added the chords as an improvised piano part, which has led to some people expecting a scored piano part to be included (sorry for the confusion!). I have since then started transcribing the piano parts, and the very first multipack is available as a harmonies + piano multipack.
I also have two other multipacks which started life as fiddle trios:
Celtic Fiddle Harmony Sheet Music Multipack 2

[Listen to audio demos] [Buy sheet music]
Celtic Fiddle Harmony Sheet Music Multipack 3
