Above that, some crucial factors will contribute to the best result:
- A good sounding room that is treated with special materials designed to create optimum acoustics.
- Knowledge and expertise: the right microphone choice and placement can tremendously influence the sound of your recording.
- Saving time: an expert professional can work very quickly and get a great sound in relatively little time.
- Well trained ears: a good engineer has trained ears and is able to detect and solve sonic related problems, which you might miss while concentrating on performing.