BU94605AKV Datasheet, PDF (15/84 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card +CD-ROM+MP3 Record

BU94605AKV BU94607AKV BU94702AKV BU94705AKV
4. Audio line output
Audio line output
Signal name
I/O
LDACO
O
RDACO
O
Function
Lch audio line output
Rch audio line output
Function
Supports Audio line outputs from built-in 1bit-DAC.
Builds in the digital soft mute function.
Builds in sound effects including POPS, JAZZ, ROCK, CLASSIC, R&B and BassBoost.
It turns ON when line output is selected by a command.
The data of the sample rate 48 kHz and 32 kHz is converted into 44.1 kHz and output.
4.1 Volume
Figure 6 shows the relationship between audio outputs and volume steps.
The initial value is step=6=–24.1dB at power ON.
0
-10
-20
-30
-40
-50
-60
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
Datasheet
Figure 6. Volume Step Function
4.2 Equalizers
You can select audio line output from 5 types of equalizers and 2 types of bus boosts, using commands. You can use a
combination of an equalizer and bus boost 1.
Even when line output is not selected, the equalizer setting is valid. However, for digital output, the equalizer cannot
change the sound quality.
Clipping may occur by the combination of volume and equalizer setting.
Figures 7 to 12 show frequency characteristics of each filter.
POPS
20
15
POPS(0x52, 0x01)
POPS+BassBoost1(0x52, 0x09)
10
5
0
-5
-10
10
100
1000
10000
100000
Freq.(Hz)
Figure 7. POPS Frequency Characteristics
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TSZ22111・15・001
15/80
TSZ02201-0V2V0E600090-1-2
2012.12.10 Rev.002