PreSonus Quantum ES4 4x4 USB-C Audio Interface with Knox Gear Headphones Bundle Zero Glide KeyStep Pro lets you quickly

KeyStep Pro lets you quickly enter a specific chord shape

turn your melodies into dense chord stacks with Chord mode

Its impressive strength makes it an ideal choice for musicians both young and old

Durable Output Jack

Made from high-strength polypropylene copolymer resin

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