I just thought about this and you are absolutly correct. The Fletcher Munson curve is to adjust measurements made with a microphone to make them match the natural imbalance in human hearing. When you EQ by ear, you are applying the Fletcher Munson curve automatically. It's a built in correction in your mind and your ears. It's the same with EQing to music. The engineer that made the recording EQed to apply the Fletcher Munson curve naturally as he mixed. If you balance a tone flat by ear, you are balancing a recording of music flat by ear too. Audibly flat is audibly flat. The only time you need to apply corrections is when you are using a microphone to measure, and you aren't using human ears.
Edited by bigshot - 4/6/14 at 4:23am