Datasheet

Description of the audio processor TDA7419
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4.4.3 Low and high frequency boost
Figure 6 shows the different loudness shapes in low and high frequency boost.
Figure 6. Loudness attenuation, f
C
= 2.4 kHz
4.4.4 Flat mode
In flat mode the loudness stage works as a 0 dB to -15 dB attenuator.
4.5 Soft-mute
The digitally controlled soft-mute stage allows muting/demuting the signal with a I
2
C bus
programmable slope. The mute process can either be activated by the soft-mute pin or by
the I
2
C bus. This slope is realized in a special S-shaped curve to mute slow in the critical
regions (see Figure 7).
For timing purposes the bit 0 of the I
2
C bus output register is set to 1 from the start of muting
until the end of demuting.
-20
-15
-10
-5
0
5
10
100
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