I have been experimenting with a Bansuri which I purchased recently. I've figured out the fingering but there doesn't seem to be a way to produce the mandra notes from Shuddha Madhyama downwards.
For example, The Abhogi Varna:
R, G, G R S, | S R S S | D M D, ||
I can't reach the Ma in the phrase above. Is this a limitation of the Bansuri?
I watched this Abhogi rendition by Pandit Ronu Majumdar. He doesn't seem to touch the mandra either.
https://www.youtube.com/watch?v=iEWqNhFS-cw
One more Abhogi, much slower, easier to identify notes lower than dha, but there don't seem to be any.
https://www.youtube.com/watch?v=5yJbffC ... FED4071B5F
I will continue to experiment, but in the meanwhile, if anybody has insights, let us hear it.