htprojsea said:
.....two different animals, imo....to me, the most important concerning a mic, would be it's frequency response range, like 20-20k, or 10-50k....whether or not +/- db variance top-to-bottom enters into a mic affecting it giving a flat response, would be another story....WmAx?.....
It is common to use microphones for recording that have substantial peaks in the upper midrange band, or other anomalies. Very flat response microphones are available(even for relative low cost if you look around enough), and even if they were not flat, one could have the microphone measured and use this measurement data to apply a digital correction to make the response flat during the recording edit process. However, this is not a normal practice. Besides the raw microphone response, you must consider the polar response of the microphone. If a recording is made in a real environment(as opposed to a sound booth), the microphone pickup pattern will play a large role in the sound. Some microphones have very narrow polar response(cardioid), and as such, will greatly attenuate off axis sounds, including much room ambiance, for example. Then there is proximity effect which affects some microphones(where low frequencies disproportionately increase as you move close to the microphone), and then there is the recording distance perspective. A close-mic recording will not usually sound very realistic, as it has a boosted top end(high frequencies attenuate disproportionately in air as distance increases, but this does not get to happen when you close-mic), and it lacks room ambiance information. Generally, this type of recording is used in completely synthetic reconstructions(multiple tracks mixed together from sound booth recordings, then equalized and reverb/delay effects added to create ambiance). It is the most popular type of method to produce commercial albums. There is no standardization, and there is no chance to get an accurate result, as you can not begin to define accurate[unless you focus on single parameter and carefully define conditions], since it's a synthetic construct.
-Chris