DIY Arduino MIDI Sequencer - Test #1

I started to design and build this midi sequencer few weeks ago. It’s a four channel MIDI sequencer that works with 32 steps (I plan to increase it to 64). In this video the keyboard is connected to the input of the sequencer and the output is connected to a Volca Bass, a Volca Keys, a Moog Sirin and a Roland JX03. I use the iPad just to process effects on the synths (using BLEASS Delay, BLEASS Reverb, BLEASS Shimmer and BLEASS Compressor as a limiter on the main output). I will provide schematics and