参数资料
型号: MAS3509F
厂商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分类: Codec
英文描述: MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
中文描述: 新加坡金融管理局35x9F的MPEG 2 / 3层,AAC音频解码器,G.729的附件A编解码器
文件页数: 52/92页
文件大小: 1186K
代理商: MAS3509F
MAS 35x9F
DATA SHEET
52
June 30, 2004; 6251-505-1DS
Micronas
3.4.4. Basic MB Configuration
With the parameters described in Table 3–16, the Mic-
ronas Bass system (MB) can be customized to create
different bass effects, as well as to fit the MB to various
loudspeaker characteristics. The easiest way to find a
good set of parameter is by selecting one of the set-
tings below, listening to music with strong bass content
and adjusting the MB parameters:
– MB_STR: Increase/decrease the strength of the MB
effect
– MB_HAR: Increase/decrease the content of low fre-
quency harmonics
– MB_FC: Shift the MB effect to lower/higher frequen-
cies
– MB_SHAPE: Widen/narrow MB frequency range
(which results in a softer/harder bass sound), turn
on/off the MB
Fig. 3–5:
Micronas Bass (MB): Bass boost in relation
to input signal level
Table 3–17:
Codec status registers on I
2
C subaddress 6D
hex
Register
Address
(hex)
Function
Name
INPUT QUASI-PEAK
00 0A
A/D Converter Quasi-Peak Detector Readout Left
bit[14:0]
positive 15-bit value, linear scale
0%
25% (
12 dBFS)
50% (
6 dBFS)
100% (0 dBFS)
0000
2000
4000
7FFF
QPEAK_L
00 0B
A/D Converter Quasi-Peak Detector Readout Right
bit[14:0]
positive 15-bit value, linear scale
0%
25% (
12 dBFS)
50% (
6 dBFS)
100% (0 dBFS)
0000
2000
4000
7FFF
QPEAK_R
OUTPUT QUASI-PEAK
00 0C
Audio Processing Input Quasi-Peak Detector Readout Left
bit[14:0]
positive 15-bit value, linear scale
DQPEAK_L
00 0D
Audio Processing Input Quasi-Peak Detector Readout Right
bit[14:0]
positive 15-bit value, linear scale
DQPEAK_R
Frequency
MB_FC
S
A
MB_SHAPE
Table 3–18:
Suggested MB settings
Function
MB_STR
(22
hex
)
MB_HAR
(23
hex
)
MB_FC
(24
hex
)
MB_SHAPE
(21
hex
)
MB off
xxxx
hex
xxxx
hex
xxxx
hex
xx00
hex
Low end headphones, medium effect
5000
hex
3000
hex
0600
hex
0902
hex
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