The Next Voice You Hear Will Be Your Own

I'm in the process of getting the interview I conducted the last week in February transcribed — or, rather, I'm in the process of trying to get it transcribed.   I've got four hours of conversation to convert, and initially, I was planning on doing it myself.  I've transcribed interviews before, but nothing quite this long – and after taking 20 minutes or so to transcribe about five minutes of conversation . . . well, that's an unimpressive effort-to-product ratio.  Clearly, I need another...