Originally Posted by BIG JIM MERRILEES
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Have you ever heard of air being added...well that is adding certain frequencies that the human ear cannot hear......it does make a big difference to the sound of other frequencies.......
so you perhaps cannot hear the air frequencies on their own but you can hear the differenc ethey make to the mix.
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That is the reason one should use an interface that will handle frequencies above and below what the human ear can normally hear. The upper frequencies add that "air" presence that lacks from cutting the frequency at the human hearing level. It's also hearing the room. The same, albeit in a bit of a different way, the lower frequencies below the human hearing can add substance to the recording and again allow you to hear the room.

That said, cheaper sound cards, as long as they can handle the frequencies can be used to put together a reasonably decent recording but the noise normally associated with a cheap card has to be removed and, let's be honest here, some of those cards are so noisy the cost in time and gear/plugins it takes to remove the noise without affecting the recording makes it more economical to spend the money for a better quality interface/soundcard.

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