Sound Performance Lab 9632 manual U d n e s s M a x i m i z e r

The Input and Output LED chains are PPM (peak level) meters. 7 LED-AnzeigenBy evaluating both LED chains an approximated effective

loudness increase can be estimated. The LED chains have a very fine resolution before 0dB. The 0dB position is actually showing 0.01dB which represents the last possible output value of the Loudness Maximizer. No clipping is possible within the algorithm of the Loudness Maximizer.

The first LED in each Input and Output PPM meter is a signal (Sig.) LED to indicate that a valid digital source is connected and detected. This LED helps you to verify the signal flow within a digital processing chain. If one Sig LED is not illuminating you have a first indication of a faulty digital signal flow.

The last LED of each Input and Output PPM meter is a Clip LED. The LED illuminates if the digital signal is too hot causing digital distortion.

Warning: Some level meters (even in digital products) show clipping striking below 0dB (full scale).You can trust the Loudness Maximizer. The PPM meters show peak levels with a precision of up to 0.01dB (0dB on scale). The internal precision is even higher.

We consider the Possible LED chain the first measuring instru- ment for analysing a possible loudness improvement at all. For measuring this parameter the input material has to be analyzed precisely. By combining this analysis with the parameters DESIRED GAIN and SOFT-HARD, it is possible to compute the loudness yet available in real-time.

The Done LED chain shows how many per cents of the DESIRED GAIN have been gained currently. When adjusting the Loudness Maximizer this value should not be under 50% permanently. The display especially reacts on the MORE DENSITY control as well as on the stucture of the source material. When the MORE DENSITY value is greater than 10, The Done LED chain may possibly show values between 60% to 90% permanently. This will only indicate that the compressor is working within its static curve.

Using the metering: If your general attitude towards loudness maximization is to do this job with no audible side-effects, the Possible LED chain should not show negative values and the Done LED chain should shows values between 90 % and 100 %, indicating that the processors can realize what you desired.

The harder you set the Limiter´s operation the more loudness can be gained. Once you leave the -9 to -5 positions of the SOFT- HARD control moving up to 0 or above you will have effects on the overall sound. If you want to compress your audio heavily you should drive the DESIRED GAIN up even if the Possible LED chain shows negative values or the Done LED chains drops down to i.e. 50%. Doing this allows you to create audible compression effects. Sometimes this is just what you want and very rarely achieveable with digital compressors.

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