Next problem: generate some realistic office background noise. He could hardly call a company posing as an OTC official to cajole a password when the only background noise was birds tweeting in the fresh country air.
No, he needed the same background buzz as a crowded office in downtown Sydney. Mendex had a tape recorder, so he could pre-record the sound of an office and play it as background when he called companies on the Minerva list. The only hurdle was finding the appropriate office noise. Not even the local post office would offer a believable noise level. With none easily accessible, he decided to make his own audible office clutter. It wouldn't be easy. With a single track on his recording device, he couldn't dub in sounds on top of each other: he had to make all the noises simultaneously.
First, he turned on the TV news, down very low, so it just hummed in the background. Then he set up a long document to print on his Commodore MPS 801 printer. He removed the cover from the noisy dot matrix machine, to create just the right volume of clackity-clack in the background. Still, he needed something more. Operators' voices mumbling across a crowded floor. He could mumble quietly to himself, but he soon discovered his verbal skills had not developed to the point of being able to stand in the middle of the room talking about nothing to himself for a quarter of an hour. So he fished out his volume of Shakespeare and started reading aloud. Loud enough to hear voices, but not so loud that the intended victim would be able to pick Macbeth. OTC operators had keyboards, so he began tapping randomly on his. Occasionally, for a little variation, he walked up to the tape recorder and asked a question—and then promptly answered it in another voice. He stomped noisily away from the recorder again, across the room, and then silently dove back to the keyboard for more keyboard typing and mumblings of Macbeth.
It was exhausting. He figured the tape had to run for at least fifteen minutes uninterrupted. It wouldn't look very realistic if the office buzz suddenly went dead for three seconds at a time in the places where he paused the tape to rest.
The tapes took a number of attempts. He would be halfway through, racing through line after line of Shakespeare, rap-tap-tapping on his keyboard and asking himself questions in authoritative voices when the paper jammed in his printer. Damn. He had to start all over again. Finally, after a tiring hour of auditory schizophrenia, he had the perfect tape of office hubbub.
Mendax pulled out his partial list of Minerva users and began working through the 30-odd pages. It was discouraging.
`The number you have dialled is not connected. Please check the number before dialling again.'
Next number.
`Sorry, he is in a meeting at the moment. Can I have him return your call?' Ah, no thanks.
Another try.