TDA7418

Description of the audioprocessor

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4.5

SoftStep-volume

When the volume-level is changed audible clicks could appear at the output. The root cause

of those clicks

could either be a DC-Offset before the volume-stage or the sudden change of the envelope

of the audiosignal. With the SoftStep-feature both kinds of clicks could be reduced to a

minimum and are no more audible.

Eight programmable softstep time from one step to the next are user selectable.

Figure 8.

SoftStep-Timing

1.

For steps more than 1dB the SoftStep mode should be deactivated because it could generate 1dB error

step during the blend-time.

4.6

Bass

There are four parameters programmable in the bass stage:

4.6.1

Attenuation

Figure 9 shows the attenuation as a function of frequency at a center frequency of 80Hz.

Figure 9.

1dB

0.5dB

-0.5dB

-1dB

Time

D00AU1170

SS Time