The worlds first established system of it's kind. Used by thousands globally. Save hours of rehearsal time with the JamSpeak "hand signals" technique. If you like the idea of getting more done at rehearsal and having a clear way to communicate "song changes" and "dynamics.."..........if you've ever had a cluttered jam and wished you could get some "space" happening......or just wanted a clear way to signal an "accent" or "tight ending..".....then read on........ Put simply, JamSpeak is a one-hand sign language for musicians to signal the changes in music. Just signal the changes and dynamics while continuing to play your instrument saving large amounts of wasted time. Avoid stopping a song to say what you want to say, just signal it. With one simple signal you can create a nice dynamic shift, a smooth ending, have everyone hit an accent at the same time and many other subtleties that give music colour and expression. There are many advantages such as improvising the structure, signalling tight endings, avoiding frustration, extending sections and more.