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Old 03-12-08, 12:30 PM   #2 (Link)
 
JohnM
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Re: Which gate time for frequency response in REQ Wizard?


The sweep is used to derive the impulse response of the room, the frequency response is then derived by applying an FFT to that impulse response with date (window) settings that you choose via the Impulse Response Windows dialog. The raw impulse response is usually 128k points, spanning 2.73s at 48kHz sample rate. The impulse is located within that period so that there is approx 1s before the peak and 1.7s after.


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