You can look at my project OscPocketD/FX - an open source multi effect for Daisy Seed detaling how to make a multifx unit with the Seed, no interface, just audio in/out.
You can look at my project OscPocketD/FX - an open source multi effect for Daisy Seed detaling how to make a multifx unit with the Seed, no interface, just audio in/out.