With its long scale length, you can tune the Trossingen Lyre from
anywhere between D and F# from the lowest note. The optimal length is E or F, The best thing is to pitch the fundamental to your Voice when you sing. Here is the Tuning in E diatonic, This example has the strings from low to high left to right, Harpists and Kantele players may like to string the Lyre the other way around with the highest note closest to the body when held. In that case, the chord shapes are mirrored.
More playing info on my playing page of my website