Sinfonye Hurdy Gurdy

[CassWheatley]

Hi Folks
I have bought a hurdy gurdy for my Hubby for Christmas..... I was wondering what tuning to use please, and what the strings are..
There are 3 strings on this gurdy and 1 row of keys.

If I sit with it on my lap, handle in my right hand, I'm guessing the melody string is the one in the middle, the one that the keys hit to produce a melody.... then there is 1 above it and 1 below it....my question is, what do I tune them too..... xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

TIA