WM8608 datasheet(30/54 Pages) WOLFSON

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WM8608

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PP Rev 1.5 March 2004

The high-pass filters pairs can be bypassed to allow full-range speakers to be used on any of the 3

main output channel pairs. The low-pass outputs from the Front channels can also be disabled to

provide Stereo In – Stereo Out capability when full range front speakers are used.

The Bass Management also provides a selectable LFE boost of 10dB via the LFEBOOST control bit.

This is to compensate for the standard practise of recording the LFE channel 10dB down in the mix.

Additional gain-adjust is provided after this block (refer to page 33).

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R13 (0Dh)

Bass

Management

Filter

1:0

LPHPCO[1:0]

Low-/High-Pass Cutoff Frequency (-3dB)

00 = 75Hz

01 = 100Hz

10 = 133Hz

11 = 178Hz

LFEBOOST

LFE Boost Enable

0 = Boost Disabled

1 = 10dB Boost Enabled

Table 24 Bass Management Filter

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R14 (0Eh)

Bass

Management

HPENF

Front High-Pass Filter

0 = High-Pass Filter bypassed

1 = High-Pass Filter enabled

Filter Bypass

HPENS

Surround High-Pass Filter

0 = High-Pass Filter bypassed

1 = High-Pass Filter enabled

HPENC

Front Centre and Rear Centre High-Pass

Filter

0 = High-Pass Filter bypassed

1 = High-Pass Filter enabled

LPENF

Front Low-Pass Filter Enable

0 = Low-Pass Filter output disabled

1 = Low-Pass Filter output enabled

LPENS

Surround Low-Pass Filter Enable

0 = Low-Pass Filter output disabled

1 = Low-Pass Filter output enabled

LPENC

Front Centre and Rear Centre Low-Pass

Filter Enable

0 = Low-Pass Filter output disabled

1 = Low-Pass Filter output enabled

Table 25 Bass Management Filter Bypass

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