The one hand recorder is a type of flute, that you find in some folk music cultures, and it could also be found with troubadours in Middle Age Europe. The special thing with it is that it can be played with one hand, the Middle Age version was called tabor pipe and the troubadours used to play a little drum with the other hand. The flute has an ordinary "piano scale", that can be reached with only three finger holes. You use the thumb for a hole on the back side, and the index finger and the little finger for the two other holes. You hold it between the middle finger and the little finger, which makes it possible to play tones with all the holes open. It comes in a left hand and a right hand version.

The one hand recorder/tabor pipe is tuned in C major, and you get the tones partly by covering the holes and partly by blowing at different strengths. In the table, the white rings mean open holes, the black dots mean covered holes

TONE	Little finger	Index finger	Thumb	Blowing strength
C				1
D				1
E				1
F				1
G				2
A				2
B				2
C				3
D				3
E				4
F				4

Apart from these marked tones, you can also get tones in between them through half covering the holes