BD9406KS2 Datasheet, PDF (25/38 Pages) Rohm – 28bit Audio DSP with Built-in 2ch ADC, 6ch DAC and ASRC

BU9406KS2
Technical Note
4-10. Compression
This function automatically adjusts the volume when sound suddenly increases, such as with explosion sounds in TV
commercials or movies, in order to prevent shocking the listener.
Input
AGCONTIME
AGC_MAX
Volume
Output^出力
AGC_MIN
AGCOFFTIME
A_RATE
&h21[7] should be set to “H” when the compression function is used.
R_RATE
Default = 0
Select Address
&h21 [ 7 ]
Value
0
1
Operation Description
Compression function OFF
Compression function ON
AGC_MAX is the input level configuration for turning compression ON. It is configured at &h21[6:4].
Default = 0
Select Address
&h26 [ 6：4 ]
Operation Description
When the time and input level configured at AGCONTIME exceeds AGC_MAX, compression is turned ON.
AGCONTIME is configured at &h22[6:4].
Default = 0
Select Address
&h22 [ 6：4 ]
Operation Description
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2012.03 - Rev.A