How can I get the time at which the audio from the microphone is received by the computer using sounddevice callback?

Question

SO I want to get the following times:-

1. t_0 = the time at which the microphone is triggered by the python code
2. t_1 = the time at which the microphone starts recording
3. t_2 = the time at which the system/computer recieves the audio from the microphone

I am doing all of this to get the exact latency.

Till now I have the following-

1. sounddevice to get the triggered time t_0

   record_voice = sounddevice.rec(int( durations * samp ) , samplerate = samp , channels = 2 )
   

2. Thinking of using usbrply for t_1 but have no clue on how to.

3. I want to use the callback function from

   https://python-sounddevice.readthedocs.io/en/0.4.5/usage.html#recording
   

to get the time t_2 but I don't know how to get the time from it.

Can anyone help me with this?