Dear Pipers,
2 summers ago I came back from a summer holiday in a Crete with a lovely double chanter askomandoura (see https://en.wikipedia.org/wiki/Askomandoura), which is a bagpipe also known in some other country as tsambouna.
I've tried to find some basic playing instruction everywhere, but had no success.
Has someone some suggestion about it?

many thanks

Alaricus

Do you already play other type(s) of mouth-blown bagpipes? The techniques of breathing and bag pressure should be similar.

You could try to find a Greek community in your surroundings (wherever that might be) - if you're lucky, they might help you make contact to someone who plays this instrument.
I have no idea what the exact difference is between askomandoura and tsambouna (if there is any) but the latter seems to be more popular if I'm not mistaken.
Also, a Turkish tulum player might be helpful - the instruments are at least similar.
This facebook group might also be helpful: https://www.facebook.com/groups/doublechanters/

In 2015 I recorded a talk with Juliann Goodacre and Calum Armstrong about Juliann's double chanter. Calum demonstrates the chanter. This might help. https://www.youtube.com/watch?v=vmwmIogICCg&t=273s

Good luck!