Adding a Pioneer Audio Video Receiver

You might be able to get some sort of IR controller or roll your own.. and control it that way..

https://www.amazon.com/IR-Remote-Control-Transceiver-Raspberry/dp/B0713SK7RJ/
(less expensive models on eBay and Aliexpress)

https://www.irdroid.com/irdroid-usb-ir-transceiver/