He reckons it cost him about $5 to build each of his cheap USB MIDI adapters which receive notes and pedal data from the keyboard’s MIDI OUT and transmit them to a computer Besides the Pro ...

Take a 5-pin DIN cable and connect your MIDI keyboard’s MIDI Out to the MIDI In on your interface. Note that, unlike USB MIDI devices, 5-pin DIN cables are not power cables as well as data ...

but their Casio keyboard only had MIDI over USB available. To get around this, [adriangin] set out to add a standard MIDI Out port to the Casio PX410R. If you want to be a hardware hacker ...