Tabor pipe

The Tabor pipe has just 3 holes, in spit of this you can play one octave.
You hold the flute on the lower end with ring-finger and little-finger. Forefinger, middle finger and thumb play on the three holes.
You can play the differnt notes with different pressure of breath.
If you close all holes you can play four different notes by different pressure:
Base note
1 . overtone, octave
2. overtone, quint
3. overtone, 2. Ooctave.
The notes inbetween for playing an octave you have different fingerings.
fingering chart

Because you play the flute just with one hand, you can use the other hand for playing a drum.
This was used in medieval and renaissance, as it is shown in many pictures.