Bill Dudley had a good Onkyo AV receiver, which worked without issues - until it suddenly didn’t.
The receiver had a dead DSP chip, which rendered the main CPU useless, as it relied on the DSP chip, and once it failed, the CPU stopped working as well.
Bill decided to use an ESP32 to replace both the DSP and the CPU, successfully managing to get the audio equipment operational again, adding even more functions to the receiver, such as Internet radio and Bluetooth streaming functionalities.
The whole project took four months to complete, and the end result is an even more functional audio receiver than the one he started with.
This is another example of how much life can be breathed into old equipment, by using programmable electronics like the ESP32.
