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The Hammer Jammer: Part Guitar, Part Keyboard
Playing with the Hammer Jammer. Pretty cool tool. - YouTube
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The "Hammer Jammer"? cheating? : r/WeAreTheMusicMakers
New-and-Improved Hammer Jammer 2015 Available Now; Watch a Demo Video | Guitar World
Hammer Jammer - Revolutionary add-on for 6-string guitar | Guitar news on Veojam.com