Harmonica Mute?? Yup. It’s a Thing.
This innovative cupping device allows you to… achieve a wide range of sounds, from traditional bluesy wah effects to more modern, experimental tones. With its combined resonator and mute effects, the Harp Wah acts like a trumpet mute for harp players, allowing you to shape your sound in previously unimaginable ways.https://www.harmonicamute.com