TL;DR - No You Cannot Unfortunately the SP404 OG/SX/A do not have a midi output, which means that it cannot control any other Midi device, let alone the SP303. My advice would be to look for something that has multiple midi outputs, and a more robust sequencer, if you'd like to control both the SP303 and the SP404 at the same time. Good luck! Hope that helps! Thanks for stopping by everybody. Keep making music, and remember, if it sounds good, it is good. Peace! For anybody who's interested, I am (slowly) going back through my SP404 projects and posting sample sets from each session onto my Patreon page. These are all licensed as BY-SA, so if you'd like to use them in your own projects, share them, or otherwise do what you want to with them, just have fun. Links mk2 Guide - https://neartao.wordpress.com/neartao... Blog - https://neartao.com Discord - / discord Soundcloud - / neartao Instagram - / near_tao Contact Email - [email protected] Support / neartao https://buymeacoffee.com/?via=neartao