DIY 4 voice arduino nano string synth (modified Jan Östman's Solina)

HALT!! 🚨🚨🚨 THERE’S AN ERROR IN THE FILTER SCHEMATIC! The 10K resistor after the dual pot should be connected to the wiper of the pot! I’ve updated the schematic in the dropbox folder, please use it instead of the one in the video! Why can i never not mess up the schematics in these videos 😭😭😭 I built my own version of Jan Östman's solina string synth. It's a 4 voice polyphonic MIDI controlled arduino nano synth and a simple 12dB analog low pass filter. It's great for pads and weirder digital sounds, perfect for lofi music. Schematics and arduino code: https://www.dropbox.com/scl/fo/suolltn88sips2b9bgjzb/h?rlkey=du6h1oh9ov9dlqzez9vttryly&dl=0 L.E.P.'s website about the filter: https://www.leploop.org/2010/07/30/12-db-low-pass-filter/ Instagram: https://www.instagram.com/lauri_diy/ TikTok: https://www.tiktok.com/@lauri_diy Discord: https://discord.gg/RSvUjhZuNV