This guide explains how to install a MIDI input in a Yamaha PSS-570 keyboard. We use uniMatrix to interface the keyboard matrix and simulate key presses.

Many thanks to Stefan for providing pictures and insight!

Installing UniMatrix

You can use a screw as in the picture below to mount the uniMatrix board. Alternatively, you can use double sided tape. We also put insulating tape to the bottom of the uniMatrix board to make sure not to create a short circuit.

Now solder the 2 power connection wires and the 15 matrix wires as shown in the picture below. Do not rely on the wire colors in the picture, these might be different in your version of uniMatrix.

Finally drill a hole using the provided drill stencil to a place where you like the best. If you choose the same spot as we did be careful not to damage any nearby parts.

That´s it. The finished installation should look something like this:

If you wish you can make changes to the configuration using our online configuration tool for uniMatrix.

Finally, here´s the config file (right click “save as”)
Yes, it says PSS-380 in the file name, but the configuration is the same here.