CS4341

DS298F5

27

6.3

TRANSITION AND MIXING CONTROL (ADDRESS 02H)

Default = 0

0 - Disabled

1 - Enabled

Function:

The AOUTA and AOUTB volume levels are independently controlled by the A and the B Channel Vol-

ume Control Bytes when this function is disabled. The volume on both AOUTA and AOUTB are de-

termined by the A Channel Volume Control Byte and the B Channel Byte is ignored when this function

is enabled.

Default = 10

00 - Immediate Changes

01 - Changes On Zero Crossings

10 - Soft Ramped Changes

11 - Soft Ramped Changes On Zero Crossings

Function:

Immediate Changes

When Immediate Changes is selected all level changes will take effect immediately in one step.

Changes On Zero Crossings

Changes on Zero Crossings dictates that signal level changes, either by attenuation changes or mut-

ing, will occur on a signal zero crossing to minimize audible artifacts. The requested level change will

occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz

sample rate) if the signal does not encounter a zero crossing. The zero cross function is independent-

ly monitored and implemented for each channel.

Soft Ramped Changes

Soft Ramped Changes allows level changes, both muting and attenuation, to be implemented by in-

crementally ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1dB per 8

left/right clock periods.

Soft Ramped Changes on Zero Crossings

Soft Ramped Changes On Zero Crossings dictates that signal level changes, either by attenuation

changes or muting, will occur in 1/8 dB steps implemented on a signal zero crossing. The 1/8 dB level

change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms

at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is

independently monitored and implemented for each channel.

7

654

32

10

A = B

SZC1

SZC0

ATAPI4

ATAPI3

ATAPI2

ATAPI1

ATAPI0

0

100

10

01