WM9711 datasheet(26/66 Pages) WOLFSON

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WM9711L

Production Data

PD Rev 4.1 April 2004

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.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

20h

General

Purpose

3DE

(disabled)

3D enhancement enable

3DLC

Lower Cut-off Frequency

0 = Low (200Hz at 48kHz sampling)

1 = High (500Hz at 48kHz sampling)

3DUC

Upper Cut-off Frequency

0 = High (2.2kHz at 48kHz sampling)

1 = Low (1.5kHz at 48kHz sampling)

22h

DAC 3D

Control

3:0

3DDEPTH

0000

3D Depth

0000: 0% (minimum 3D effect)

0001: 6.67%

…

1110: 93.3%

1111: 100% (maximum)

Table 13 Stereo Enhancement Control

Note:

All cut-off frequencies change proportionally with the DAC sample rate.

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