AK4695 Datasheet, PDF (42/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
3. Example of ALC Setting
Table 29 and Table 30 show the examples of the ALC setting for recording and playback path.
Register Name
LMTH1-0
WTM1-0
REF7-0
IV07-0, IV17-0,
IV27-0, IV37-0
RGAIN2-0
RFST1-0
ALCEQN
ALCx
Comment
Limiter detection Level
Recovery waiting period
Maximum gain at recovery operation
Gain of IVOL
Recovery GAIN
fs=8kHz
Data
Operation
01
4.1dBFS
01
32ms
B0H
+30dB
B0H
+30dB
001
0.00212dB
Fast Recovery GAIN
11
0.0127dB
ALC EQ disable
0
Enable
ALC enable
1
Enable
Table 29. Example of the ALC Setting (Recording)
fs=48kHz
Data Operation
01
4.1dBFS
11
21.3ms
B0H
+30dB
B0H
+30dB
011 0.00106dB
(2/fs)
00
0.0032dB
0
Enable
1
Enable
Register Name
LMTH1-0
WTM1-0
REF7-0
IV07-0,
IV17-0
RGAIN2-0
RFST1-0
ALCEQN
ALCx
Comment
Limiter detection Level
Recovery waiting period
Maximum gain at recovery operation
Gain of IVOL
Recovery GAIN
fs=8kHz
Data
Operation
01
4.1dBFS
01
32ms
70H
+6dB
60H
0dB
001
0.00212dB
Fast Recovery GAIN
11
0.0127dB
ALC EQ disable
0
Enable
ALC enable
1
Enable
Table 30. Example of the ALC Setting (Playback)
fs=48kHz
Data Operation
01
4.1dBFS
11
21.3ms
70H
+6dB
60H
0dB
011 0.00106dB
(2/fs)
00
0.0032dB
0
Enable
1
Enable
MS1463-E-01
- 42 -
2014/12