I don't know anything about Irish bagpipes (Uillean Pipes). If I recall correctly from a few decades ago, the Scottish bagpipes are diatonic, not chromatic, and only play 9 notes.

These are from G above middle C to A one octave and one note above the starting G.

The key is mixolydian G (i.e. G A B C D E F G) where the F is natural and not sharpened like in the major key.

Here's a bit more about them...

http://www.bagpipejourney.com/articles/finger_positions.shtml

Regards,
Noel


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