BD9406KS2 Datasheet, PDF (18/38 Pages) Rohm – 28bit Audio DSP with Built-in 2ch ADC, 6ch DAC and ASRC

BU9406KS2
Technical Note
4-3. Channel Mixer
Performs the mixing configuration of the left and right channel sounds of digital signals input to the sound DSP.
Stereo signals can be changed to monaural here.
Mixes DSP Lch input data.
Default = 0
Select Address
&h2A [ 7：6 ]
Value
0
1
2
3
Operation Description
Inputs Lch data
Inputs (Lch+Rch)/2 data
Inputs (Lch+Rch)/2 data
Inputs Rch data
Mixes DSP Rch input data.
Default = 0
Select Address
&h2A [ 5：4 ]
Value
0
1
2
3
Operation Description
Inputs Rch data
Inputs (Lch+Rch)/2 data
Inputs (Lch+Rch)/2 data
Inputs Lch data
4-4. Pseudo-Stereo 2
Recreates stereo feel in monaural sound through signal treatment.
The quality of this pseudo-stereo treatment is higher than that of the pseudo-stereo of “5-5 Surround and Pseudo-Stereo 1”.
Selection of Pseudo-Stereo 2 Filter Effect
Default = 0
Select Address
&h71 [ 1：0 ]
Value
0
Pseudo-stereo OFF
Operation Description
1
Effect configured to “weak”
2
Effect configured to “strong”
Sound is further enhanced when used together with surround (&h70[7]=1).
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2012.03 - Rev.A