wm9712l Wolfson Microelectronics plc, wm9712l Datasheet - Page 27

• Manufacturer Part Number: wm9712l
• Description: Ac?97 Audio And Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

Production Data
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3D STEREO ENHANCEMENT
The 3D stereo enhancement function artificially increases the separation between the left and right
channels by amplifying the (L-R) difference signal in the frequency range where the human ear is
sensitive to directionality. The programmable 3D depth setting controls the degree of stereo
expansion introduced by the function. Additionally, the upper and lower limits of the frequency range
used for 3D enhancement can be selected using the 3DFILT control bits.
Table 13 Stereo Enhancement Control
Note:
1.
20h
General
Purpose
22h
DAC 3D
Control
REGISTER
ADDRESS
All cut-off frequencies change proportionally with the DAC sample rate.
13
5
4
3:0
BIT
3DE
3DLC
3DUC
3DDEPTH
LABEL
0
(disabled)
0
0
0000
DEFAULT
3D enhancement enable
Lower Cut-off Frequency
0 = Low (200Hz at 48kHz sampling)
1 = High (500Hz at 48kHz sampling)
Upper Cut-off Frequency
0 = High (2.2kHz at 48kHz sampling)
1 = Low (1.5kHz at 48kHz sampling)
3D Depth
0000: 0% (minimum 3D effect)
0001: 6.67%
…
1110: 93.3%
1111: 100% (maximum)
DESCRIPTION
PD Rev 4.5 August 2006
WM9712L
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