Denis Wick's chokes have set the standard for brass tone and intonation for many years. They offer an amazing breadth of tonal colors and their use has been an integral part of many classical and avant-garde orchestral works, film scores, big band sounds and other jazz ensembles.
Wah-wah choke for trumpet.
https://www.youtube.com/watch?v=jpbcUaU6nMw
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