External MIDI Interface & Mixer

How to use?

-> Open it at EasyEDA (website: easylda.com) .

Click "Document" > "Open" > "EasyEDA Source", and select "PCB_External MIDI Interface.json".

Notice for sound card without LINE IN connector:

This card can mix MIDI output and soundcard output.

Just insert the soundcard output port into the INPUT port of this.