I guess flutes and whistles may be considered vehicles for breath music.
But here is a c.90 year old yogi without a flute or a whsitle. just one breath
As the inimitable j w wren said on seeing this,
“There we have an audience applauding a man for breathing” …
Uh huh. Its called Ujjayi breath and its the way one breathes while doing hatha yoga asanas.
Btw, BKS Iyengar was Yehudi Menuhin’s yoga teacher. Breathing like that comes in handy playing the fiddle too
but it drives the person operating the sound board crazy.