Audio hours is the measurement used for the length of audio you'll be transcribing. If the audio clip is 30 minutes long, that is one half of an audio hour. Working hours is the measurement of the time that you're working. For example, if it takes you two hours to transcribe that 30-minute clip, your working hours would be two hours.-Your working hours will always be longer than the audio hours you are transcribing. While most jobs will pay you according to the number of hours you work, many online transcription jobs will pay you based on the number of audio hours you transcribe. The faster you are, the more money you can make. If you're paid per audio hour, it's important to track the actual time you're working so you can calculate the hourly rate for your working hours.