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參數資料
| 型號： | DDX4100ERRATA |
| 英文描述： | DDX4100 Errata January 17 2002 |
| 中文描述： | DDX4100勘誤表02年1月17日 |
| 文件頁數： | 19/27頁 |
| 文件大小： | 1737K |
| 代理商： | DDX4100ERRATA |
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DDX-4100
Proprietary Mode’
Mute
0
0
0
0
0
0
0
0
0
0
0
1
Mx6 – Mx0
000 0000
001 1111
011 1111
***
110 0001
110 0010
110 0011
110 0100
110 0101
110 0110
110 0111
110 1000
xxx xxxx
Function
0 dB Attenuation
31dB Attenuation
63dB Attenuation
***
97dB Attenuation
99dB Attenuation
100dB Attenuation
102dB Attenuation
104dB Attenuation
107dB Attenuation
111dB Attenuation
∞
dB Attenuation
∞
db Attenuation
12.3 Tone Control Register (address 08h)
D15 D14 D13 D12 D11 D10
X
X
X
X
D9
D8
BA0
D7
X
D6
X
D5
X
D4
X
D3
TR3 TR2 TR1
D2
D1
D0
TR0
BA3 BA2 BA1
This register supports tone controls (bass and treble). Writing a 0000h corresponds to +12dB of gain.
The frequencies (from which gains are measured) are 160Hz for Bass and 5,000Hz for Treble. The
default value is 0F0Fh, which corresponds to bass and treble bypass. The tone feature is implemented
only on the L and R front channel.
TR3… TR0 or BA3… BA0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
The tone control in the DDX-4100 is implemented in such a manner that boosting can create clipping of
the audio regardless of the volume setting. This is because the Bass/Treble boost occurs before the
volume control. Meaning, for example, if the bass boost is set at +8dB then any low-frequency program
material recorded above -8dBFS will clip within the bass boost processing. Implementing attenuation
prior to the DDX-4100 can solve this problem. Many audio decoding ICs provide a volume control that
can accomplish this. An attenuation of -12dB should be implemented in the decoding IC. Therefore no
clipping will take place in either the bass or treble boost regardless of the setting. Volume is controlled
normally using the DDX-4100, except when maximum DDX-4100 volume(0dB) is reached. The
attenuation in the decoder IC will then have to be decreased from -12dB to 0dB in the appropriate volume
step size to obtain maximum gain through the system. This implementation will only create signal clipping
once maximum output has been reached. Therefore it will clip like any other amplifier regardless of the
bass/treble settings
Function
+12dB of gain
+10dB of gain
+8dB of gain
+6 dB of gain
+4dB of gain
+2 dB of gain
+1dB of gain
0dB of gain
-1dB of gain
-2dB of gain
-4dB of gain
-6dB of gain
-8dB of gain
-10dB of gain
-12dB of gain
Bypass
19
Details and Specifications are subject to change without notice
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