sta381bws STMicroelectronics, sta381bws Datasheet - Page 34
sta381bws
Manufacturer Part Number
sta381bws
Description
Sound Terminal 2.1-channel High-efficiency Digital Audio System Sound Terminal 2.1-channel High-efficiency Digital Audio System
Manufacturer
STMicroelectronics
Datasheet
1.STA381BWS.pdf
(168 pages)
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Device overview
4.3.7
4.3.8
34/168
Offset
The offset is a user-selectable gain or volume control. When using the STC it is advised to
use the offset to tune the output volume instead of the regular volume controls. The offset is
located before the attenuator block, ensuring that the output power limit (limiter threshold) is
never exceeded
the STC attenuator, thus a wrong setting of this control could nullify the STC effect.
Each sub-band has its own and independent offset. Its range is [0, +48] dB with a 0.25 dB
step
Figure 12. Offset effect
Stereo link
The stereo link feature allows applying the same attenuation to the corresponding band of
each channel (i.e. band 0 left channel and band 0 right or band 1 left channel and band 1
right channel). This should help to prevent image shiftings that could occur when individually
compressing each channel and causing a volume mismatch between left and right.
When the stereo link is active, the proper attenuation for each band is independently
computed, then the highest one for each band is applied
(Table
12).
(Figure
12). On the other side, the traditional volume control is located after
Doc ID 018937 Rev 2
(Figure
13).
STA381BWS
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