Production Data
WM9715L
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.
REGISTER
ADDRESS
BIT
LABEL
3DE
DEFAULT
DESCRIPTION
20h
13
0
3D enhancement enable
(disabled)
General
Purpose
22h
5
3DLC
0
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
DAC 3D
Control
4
3DUC
0
3:0
3DDEPTH
0000
0000: 0% (minimum 3D effect)
0001: 6.67%
…
1110: 93.3%
1111: 100% (maximum)
Table 13 Stereo Enhancement Control
Note:
1. All cut-off frequencies change proportionally with the DAC sample rate.
PD Rev 4.0 December 2007
27
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
