I'd like to have a recording of my brother's calls

If you could only hear how he sounds when he calls and leaves a message. It is always kinda, I'm not sure how to describe it, condescending, disappointed, talking down sounding like he tinks I'm here but not answering.
His last message wnet like this.
Ke vin (pause)
It's Keith (pause)
It's Friday night around 8:30, call me back (pause)
Tonight.
It is never a left message other than he called call him back. He never leaves me any information or reason to call him back other than that he called and he always sounds like
"Muuuh, muh mu-uh
Fuuuu duh duh, duuuh.
Fuh duh.
It is really frustrating. I just want to yell at him leave a fucking message and stop talking to me like I'm some animal who's attention you are trying to get.
Peace.