Datasheet

TDA7419 Description of the audio processor
19/40
Figure 7. Soft-mute timing
1. Please notice that a started mute-action is always terminated and could not be interrupted by a change of
the mute -signal
4.5.1 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 audiosignal. 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 in four steps.
Figure 8. Soft-step timing
1. For steps more than 0.5dB the Soft-step mode should be deactivated because it could generate a hard
1dB step during the blend-time.
4.6 Bass
There are four parameters programmable in the bass stage:
1
EXT.
MUTE
+SIGNAL
REF
-SIGNAL
1
I
2
C BUS
OUT
Time
D97AU634
1dB
0.5dB
-0.5dB
-1dB
Time
D00AU1170
V
OUT
SS Time