teensy 16 step sequencer with rgb rotary controller – update

So here is an update on the progress of the step sequencer. The RGB rotary controllers from Sparkfun have continuous rotation but also have a button incorporated. The chips being used are the MCP23S17 port expanders. They have interrupt capability, but this was not work out well for me, so currently relying on polling, which seems more than adequate right now. Video below: