wm9714l Wolfson Microelectronics plc, wm9714l Datasheet - Page 40

• Manufacturer Part Number: wm9714l
• Description: Ac?97 Audio Codec
• Manufacturer: Wolfson Microelectronics plc

WM9714L
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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 18 Stereo Enhancement Control
Note:
1.
40h
General
Purpose
1Eh
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 Control
1 = Enabled
0 = Disabled
3D Lower Cut-off Frequency Control
1 = High (500Hz at 48kHz sampling)
0 = Low (200Hz at 48kHz sampling)
3D Upper Cut-off Frequency Control
1 = Low (1.5kHz at 48kHz sampling)
0 = High (2.2kHz at 48kHz sampling)
3D Depth Control
0000 = 0%
… (6.67% steps)
1111 = 100%
DESCRIPTION
PP, Rev 3.2, October 2008
Pre-Production
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