TDA7718B Datasheet, PDF (17/40 Pages) STMicroelectronics – 3 band car audio processor

TDA7718B
Description of the audioprocessor
4.4
Soft-step 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 audio signal. With the soft-step-feature both kinds of clicks could be
reduced to a minimum and are no more audible. The blend-time from one step to the next is
programmable as 5 ms or 10 ms. The soft-step control is described in detail in Chapter 4.9.
4.5
4.5.1
Bass
There are four parameters programmable in the bass stage:
Bass attenuation
Figure 8 shows the attenuation as a function of frequency at a center frequency of 80 Hz.
Figure 8. Bass control @ f_C = 80 Hz, Q = 1







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