Quote:
Originally Posted by guitarist155
have to repeat myself here, if you use spot treatments as sound proofing and treat the whole wall as would have to be done to prevent sound from leaking. you will kill the acoustics as it will take all the highs out and make the room "boomy"
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Not necessarily. To do it correctly though, one would have to cover absorption with reflective surfaces so that what goes past the reflection points is absorbed. In effect, one would make the whole room absorptive and then add reflective panels to effectively re-liven the room. That would of course be a large undertaking.