As good as the clock looks, it is apparently impractical. The problem is that 440 Hz tone is audible. If you think a ticking clock will drive you mad, try a constant 440 Hz tone. We were amused ...

This is an example project for grabbing data from PCM1808 ADC and sending it to PCM5102 DAC. Additionally the ESP32 DAC peripheral is used to generate a 440 Hz test tone on the DAC CH0 output pin (25) ...