Measure the delay between 2 beeps in millisecond

chromecast audio users (dongle or , AVR , connected speakers) sometimes experience delays between different audio devices. The metronome generates a beep according to a defined tempo which is sent to 2 speakers in the network. A microphone placed between the 2 speakers measures the delay and the user manually modifies the delay value for each device.Of all the loudspeakers, the one that reacts too quickly and where you hear the sound first is the master loudspeaker to which you first apply the milisecond delay with the highest value.a kind of oscilloscope that measures the time between 2 closely spaced beeps.So; the same metronome sound is sent to different speakers. But the position and nature of the devices with speakers in the house means that the sound is desynchronized. the maximum delay time that can be configured on audio speakers using the chromecast protocol is 200 ms.