8. AUDIO PROCESSING
Adjust the Bandwidth(Q) and Gain(dB) until the smoothest response is achieved. The LFE
equalizer is a Parametric EQ filter with adjustable Center Frequency (20 to 120Hz),
Bandwidth (0.5 to 10Q) and Gain (-12 to 6dB).
After all the full‐range channels have been equalized, follow these steps:
1) Generate ‘Pink Noise’ output from both Center and LFE channels by using the Signal
Generator on the SR-1000 Web UI Audio tab (refer to Section 8.1.3).
2) Select the LFE tab to make it the active channel.
3) Set the LFE Parametric EQ Gain to 0dB. This disables LFE Parametric EQ so that you
can determine the low‐frequency resonant peak to be equalized. Note the band where
the un-equalized peak appears.
4) Decrease the Gain slider to -12dB. Using the Frequency slider, move the dip in the
frequency response along the frequency axis of the RTA display.
5) Adjust the Frequency so that the Center of the dip is in the same band as the peak
displayed in the previous un-equalized frequency response.
6) Using the Gain slider, slowly increase the Gain to flatten the dip. The Center of the dip
should be at the same level as the skirts.
7) Click to check other Bandwidth(Q) values for the flattest possible frequency response.
8) If there is a notch in the transition region between the LFE and Center channel
frequencies, try inverting the phase on the LFE channel using the Phase Invert drop-
down to check if the notch has improved. If this is the case, please check the
subwoofer polarity.
8.6.2.5 Final Channel level Adjustment
1) Generate ‘Pink Noise’ output from the Center channel by using the Signal Generator on
the SR-1000 Web UI Audio tab (refer to Section 8.1.3).
2) Adjust the gain of the Center channel until the level value displayed on RTA (sound
pressure meter or SMAART) reaches 85dB.
3) Repeat steps 2) and 3) to adjust the Channel Gain of the Left/Right/Center channels
respectively until the level value displayed on RTA (sound pressure meter or SMAART)
reaches 85dB and Channel Gain of Ls/Rs/Bsl/Bsr channels respectively until the level
value displayed on RTA (sound pressure meter or SMAART) reaches 82dB.
4) Repeat steps 2) and 3) to adjust the Channel Gain of the LFE channel until the level
value displayed on RTA (sound pressure meter or SMAART) reaches ~91dB.
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