As of today, 8/2/2019, I am the only one that can teach the QB.  Quartal Corporation will have our version (4 octave 9×9 (beta model) ready for limited production.  As well as an introductory teaching method.

Read More –THE QB IS IN PUBLIC DOMAIN (ANYONE CAN MAKE AND SELL IT).–

TAKE A LOOK.  Like the guitar (a distant relative) the QB can be learned using geometric patterns (tablature).  This increases the learning speed of basic music and performance by at least 50% of that required by either piano or guitar.

Read More QB DEMO (OVERVIEW)