Yamaha YMP-204M Series Marching F Mellophone Brass Instrument MIDI Interfaces external side chain input is

external side chain input is available with completely customizable channel linking and routing

A Special Edition of Universal Audio's Acclaimed Apollo Twin X Interface w/ DUO Core Processing and a Bundled UAD Plug-In Package Worth over $1

and effective in a wide range of applications

or just to jam with

Yamaha YMP-204M Series Marching F Mellophone Brass Instrument MIDI Interfaces external side chain input isThe 204M features a rich vibrant sound with excellent tonal projection. Yamaha R&D conducted extensive field tests with leading bands, and has redesigned the bracing for a more open 'free blowing' feel. The overall balance has also been changed making it more comfortable to hold and play, while the slide configuration has been reworked improving both intonation and tone qualities.