So, this tool records audio from a phone call, analyses it, and then reproduces the voice phrase needed to unlock the system you're hacking. Of course, this is a game, and so it doesn't actually place a phone call or record audio if you hadn't guessed.

Using this is easy, but it is not obvious!

• Step 1: Figure out who to call. I needed to hack a bank, so connect to the bank and use the "About Us" button to get a phone number for the administrator. Store that with the + button.
  
• Step 2: Disconnect from the bank and launch the Voice Analyser.
  
• Step 3: Using the new address/phone number from your Main Screen, Call the administrator by connecting to the new server in your list. It'll be the phone number of the administrator that you stored in Step 1.
  
• Step 4: The Analyser should kick in automatically, recording and processing the voice.
  
• Step 5: Reconnect to the bank and access Admin, and Voice Print Identification.
  
• Step 6: Press play on the Analyser.
  
• Step 7: GO hack, because they're already tracking you now.

Also of note is the difference between version 1 and version 2 of the Analiser: Version 1 is a one-off program, where as version 2 gives the ability to store voice prints for later use. I've not mucked about with version 2, but here's what my commenters had to say about it:

Version 2 of the Voice Print Analyser works much the same as Version 1, except that, should you wish to save a voice print, so you can close the process and come back to it at some point later, you can drag from the graph window inside the analyser to storage. Later, when you want to use this file again, drage the Analyser window on to the file you want to use, so you don't have to phone your target again. (This sounds like its backwards, but like I said, I haven't played with V2, so hearsay. If it doesn't load the file that way, try dragging the file onto the Analyser window.)