Positive Grid, maker of mobile guitar apps BIAS and JamUp, today announced the release of the BT-2 and BT-4, two fully-programmable Bluetooth MIDI foot controllers. These two-button and four-button controllers boast I/O features for iPhone, iPad and Mac, allowing hands-free control over iOS and Mac apps. Users of MIDI-supported apps will be able to switch… Read More Positive Grid Intros Bluetooth MIDI Foot Controllers w iOS Features