I have a audio processing project with esp32:

mic(in) -> adc(external, pcm1808) -> esp32(filters, effects process) -> dac(external, pcm5102a) -> dynamic(out)

I wonder how can I measure a delay time for this scheme. I think that I can release the ADC and just calculate the delay for the chain:

internal esp32 sinus generator -> filters, effect process -> dac(external, pcm5102a). How can I do this?