The composition Freda is a great tune for practicing double tonguing, but a bit hard to play in the original key. It’s recorded by the Yellowjackets and you will find it on the Greenhouse album, one of my favorite albums by them. So I transposed it to C (for Bb trumpet) which is a bit easier on the fingers (and embouchure)…
N.B. for educational purposes only.
Freda-in-C