4 in 4 Matrix Line Switch

[EoA]

Hello,
Actually, I'm planning to construct a 4 in 4 Matrix Line Switch to feed 4 different amps from 4 different sources.

What are the desired features?

• Arduino controlled.
• Switching between source and destination with a rotary encoder switch.
• Switching between source and destination with remote control and switch mute on/off.
• Havin a config file on SD card to name the differnt in- and outputs and to use own IR remote control codes.
• All outputs terminated with 470kOhm if not in use or if mute modus is on.
• All inputs are terminated with 100 Ohm if not in use or if mute modus is on.
• LCD or OLED Display to show the actual in- output and to choose with the encoder switch.

On software base this is finished. See the schematic and laboratory setup below. Actually, I'm waiting for the housing which comes from France. Will keep you posted on how it works. If someone is interested in parts of the source code for the Arduino please let me know. Any input is highly appreciated. Best - Sascha