Sound Performance Lab EQ MAGIX manual Parametric

Parametric

Fig. 2:

The processable frequencies of the EQ MAGIX´s PARAMETRIC stage ranges from 14 Hz to 58 kHz.

As an example the frequencies 14 Hz, 280 Hz, 2 kHz and 58 kHz are boosted by +15dB.

Practical applications bring accurate processing of subwoofer tracks to mind, along with a problem which modern recording procedures (PCM, hard disk, samplers etc.) frequently involve; here, the frequencies recorded are often in the infra-sonic frequency range (digital coding). When they are reproduced (which involves D/A conversion), low-frequency signal portions can cause phase distortions in the audible range, creating secondary effects which cannot be corrected subsequently. The EQ MAGIX can filter these interferences out.

On the other hand, modern sound reproduction technology is extending the range of frequencies which can be used sensibly, by the addition of lower and lower frequencies.

On the potentiometer scale, the frequency 1 kHz has been outlined for reasons of clarity and ease of orientation.

The diagram below shows the frequency range which can be processed by the EQ MAGIX in the PARAMETRIC stage: 14 HZ to 58 kHZ:

The BOOST/CUT control determines amplification and attenuation of the Boost/Cut 9 selected frequency range. Increases and decreases of +15 dB and -15dB

are possible.

Apart from determining boost and cut, the BOOST/CUT control has a second function when the NOTCH mode has been activated:

Once the NOTCH filter has been activated, the BOOST/CUT control changes to the ROLL-OFFfunction, thus becoming the control for basic sound charac- teristics (also see point 12, NOTCH/ROLL-OFF). In the -15dB setting (extreme left) the slope of the Notch (ROLL-OFF) corresponds to a flat rise or fall. This position is known as GENTLE. In the +15 dB setting, (extreme right), the ROLL-OFFcorresponds to a steep rise or fall. This position is known as STEEP.

The EQ MAGIX is designed to be able to process individual signals and therefore supports the constant-Q principle so as to allow quick and accu- rate work, which also permits influencing the sound quite drastically.

In the constant-Q principle, the amplitude of any frequency selected remains constant if the bandwidth (Q) is increased or decreased.

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