The Donskoy ryley () is a
stringed musical instrument
In musical instrument classification, string instruments, or chordophones, are musical instruments that produce sound from vibrating strings when a performer strums, plucks, strikes or sounds the strings in varying manners.
Musicians play so ...
from Russia. It is a type of
hurdy-gurdy
The hurdy-gurdy is a string instrument that produces sound by a hand-turned crank, rosined wheel rubbing against the strings. The wheel functions much like a violin (or nyckelharpa) bow, and single notes played on the instrument sound similar ...
, where the strings are constantly bowed by a wheel which is turned using a crank, and the pitch of the strings changed by keys attached to sliding tangents.
[https://stringedinstrumentdatabase.aornis.com/d.htm The Stringed Instrument Database :D]
References
{{Reflist
Hurdy-gurdies
Russian musical instruments