We were very curious about Keith McMillen’s polyphonic sustainer for guitar, so we went to their booth for a special introduction at NAMM 2014.
![[NAMM][VIDEO] Keith McMillen StrongArm Sustainer](https://img.audiofanzine.com/img/product/normal/2/0/203428.jpg?fm=pjpg&w=334&h=243&fit=contain&s=b406b3dcc31c511195dcce65f9a9d838)