Sound Performance Lab EQ MAGIX manual Deep Mid-Hi Tune

The VITALIZER's control elements

Deep

Mid-Hi Tune

The DEEP circuit increases the processed bass range. The bass range 17 encloses frequencies between ca. 20 Hz and 110 Hz with a bass centre frequency at 50 Hz. The DEEP function enlarges this range to approx. 16 Hz to 140 Hz with the same bass centre frequency and increases the amplifi-

cation level by ca. 3 dB.

The MID-HITUNE control is used to set the starting frequency of the 18 broad-band shelving filter. In line with the setting of PROCESS control, all frequencies above this value right through to the end of the audio range

are processed.

The control range of the MID-HITUNE control is between 1 kHz (extreme right) and 20 kHz (extreme left). In practice, common settings vary between 3.5 kHz and 8 kHz.

As the human ear perceives the range between 1 kHz and 3 kHz parti- cularly clearly, at all volumes between 0 and 120 phon it makes sense to adapt this frequency range. You might feel inclined to say "Yes, but I do that with my graphic EQ as well". The main difference is that the graphic EQ really reduces the effective loudness of the frequency, i.e. cuts out the appropriate frequencies, thus changing the spectral content of the original signal. The VITALIZER , however, relies on a more subtle method of ampli- tude-depending phase shifting. This does not involve altering the spectral composition of the signal but it does maintain the subjective impression of loudness. Moreover, graphic equalizers produce comb-filter effects because of the interaction between adjacent filters, when broad-band frequencies are raised. The MID-HITUNE filter can raise the broad-band spectrum with a very linear frequency response, without colouring the signal.

Above the MID-HITUNE value set, the VITALIZER filters create a linear increase, i.e. one that is adapted to the human ear. This compensates any inability of our hearing as regards perceiving frequencies ranging between 5 kHz and 10 kHz. The MID-HITUNE filter works with a wide bandwidth and always sounds musical, never „bell-like“. Gradually go down from 20 kHz (extreme left) to lower frequencies. The further down you go, the brighter the sound image becomes, as an increasing number of frequencies are included in the process.

The MID-HITUNE control can also be used to tone down excessively sharp-sounding material, by setting frequencies of 10 kHz or higher, and setting the PROCESS control on MAX. Seeing as the PROCESS control is also responsible for deleting dominant mid frequencies, all frequencies are gradually reduced down to the application frequency, in conjunction with high starting frequencies of the MID-HITUNE control.

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