Hello, I understand that the question I'd like to ask may be considered slightly odd by some, but hope it will meet understanding. I am trying to improve my low range. Not in order to improve my high range, but because I like the low range, and it is not that much covered in the literature. The principle of extending the midrange embouchure downwards is clear to me and practically works rather well for me down to pedal E, occasionally to pedal D on Bb trumpet. I'm satisfied with the range. However, I'd like to improve the agility, and beauty of tone, in order to get a more subtle, breathy tonal quality, like Tom Harrell and Jon Hassell often use in their music. I know this is not very "breath-efficient", yet the beauty of tone they get justifies it IMHO. Most of the time I play for the microphone, so loudness is not an issue to me. Are there any recommended exercise for this? Thanks in advance!