[AKD4648-C]
<KM088701>
2007/04
-
26
-
8. [Filter Dialog]
This dialog can easily set the AK4648’s programmable filter.
Figure 12. [Filter] window
8-1. Value input columns on left side
[Sampling Rate]
Æ
Input value of sampling frequency [unit : Hz] <default : 44100>
[Cut Off Frequency of FIL1]
Æ
Input value of cut off frequency of FIL1 [unit : Hz] <default : 150>
[Cut Off Frequency of FIL3]
Æ
Input value of cut off frequency of FIL3 [unit : Hz] <default : 4000>
[Pole
Frequency
of
EQ]
Æ
Input value of pole frequency of EQ [unit : Hz]
[Zero
Frequency
of
EQ]
Æ
Input value of zero frequency of EQ [unit : Hz]
[FIL3
GAIN]
Æ
Input value of gain of FIL3 (0~
−
10dB) [unit : dB]
[EQ
GAIN]
Æ
Input value of gain of EQ (+12~0dB) [unit : dB]
8-2. Check box on left side
Check Box
Check
Check off
FIL1
FIL1 bit =“1”
FIL1 bit =“0”
FIL3
FIL3 bit =“1”
FIL3 bit =“0”
EQ
EQ bit =“1”
EQ bit =“0”
LPF of FIL1
F1AS bit =“1”(LPF)
F1AS bit =“0”(HPF)
LPF of FIL3
F3AS bit =“1”(LPF)
F3AS bit =“0”(HPF)
8-2. [Register Setting] panel and [Register Setting] button on right side
Click [Register setting] button, then filter coefficient set by 8-1 and 8-2 is written on [Register setting] panel.
(It is also written to the actual control register of the AK4648.)
