Audio recording technology has come a long way since I started out in 1996. My first recorder was a small radio sized recorder (sometimes called a shoebox recorder) that used regular cassette tapes. One tape could record 30 or 45 minutes per side with two sides, but the rule was to not record on both sides as “bleeding” of voices or noises could potentially occur. The tapes produced their own white noise in the form of a mild hiss along with any mechanical sounds of the recorder which were usually recorded unless a separate microphone was used and the recorder hidden.    One learned quickly how to lubricate the device to keep these noises to a minimum or buy an external microphone. Working a case would usually mean buying a handful of tapes, although I...