Control elements

Fig.1:

The dotted line shows frequency responses for a soft Bass (SOFT) at maximumPROCESS and a MID-HITUNE of 3.5 kHz.

The solid line shows the phase response, which always drifts only a few degrees if the amplitude is increased.

Fig. 2:

The dotted line shows frequency responses for a hard Bass(TIGHT) at maximum PROCESS and a MID-HITUNE of 3.5 kHz.

The solid line shows the phase response whichhas a phase relation of -180° at 50 Hz, but otherwise also drifts only by a few degrees at increasing amplitudes.

The PROCESS control determines the processing ratio between the set bass sound colour and the original signal. This results in varying bass sound structures: if you combine high bass amplification on the BASS control with a lower PROCESS value, you get a different bass structure than with a lower bass amplification combined with a higher PROCESS value. Choosing the best solution is a matter of personal taste and also depends on the type of original signal involved.

The MID-HITUNE control is used to set the starting frequency of the Mid-Hi Tune 4 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

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