Ilustrating live voice on console

I wanted to connect to the channel sip what is use and watch a graph of voice in hz or dbm, in console as shown in the data time / frequency or time/dbm , some thing like vumeter but in the numerical notation in real time on the console.

I thought about that use sip client to connect conversation with chanspy and prints to the console analog voice data.
But I don’t finded sip client command line what can show me graph of voice in data (time/frequency).

But maybe there’s a simpler way that someone would have told me.

Please help

Grzegorz Maciak