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choose files... Click to choose files I am hard to print pcb with the schema is correct there are some components pngganti like lf 33 I replace with lm3940 low drop regulator but I do not menggunan The KissBox RTP-MIDI OEM board but usb midi not detected dila in pairs in stm32f4 brakout ver221 with rtp midi readi this follows schenaticnya