MIDI in and out for the NerdSEQ, plus a Sega Genesis gamepad port for driving the sequencer from a D-pad…

TRS-A MIDI in just 2 HP, for the case that ran out of room a while ago.

Three independent MIDI streams, two I2C ports, and extra buttons and an encoder for editing modes the front panel has…

Sixteen more trigger and gate outputs, for when one drum voice quietly becomes eight.

Sixteen more CV outputs, and the modulation to make them worth having.

HDMI or composite out, a video synthesizer, and somewhere to plug a keyboard.

A multi-oscillator that puts chords straight into the sequencer — two banks of four oscillators, four mixable waveforms each, so…

Polyphonic sequencing over Tiptop’s ART protocol, straight from a NerdSEQ track.

A port for a Sega Genesis gamepad, for people who would rather perform with a D-pad than a menu.