along with a 32Mbit sound font for GS. MIDI data is received from the host via MIDI_IN, and are interpreted simultaneously with MIDI messages by the MIDI handler. Most of control parameters can be adjusted real time during the synthesis of the musical notes according to the GS specification. The QS1532 is the best solution to put at the heart of your designs for digital pianos, karaoke machines, electric keyboards, and all other sorts of digital musical instruments. 2. Features.