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MAIN PAGE
Output
Select no. of bits dithered to:
8 bit
16 bit
(default for S/PDIF)
18 bit
20 bit
22 bit
24 bit
(default for AES)
FADE SECTION
CURVE
sets the fade-out curve
TIME
sets the fade-out time
FADE
up/down/stop
LEVEL
set fader level manually.
Note:
If an external fader is connected, all of the above
parameters are disabled.
Select the OUT section in the Main page by pressing
the BLOCK keys
Dither
The use of Dither is very important when interfacing digitally
between audio equipment.
Every time resolution is changed from higher to lower, Dither
(randomization) is necessary to minimize distortion for signals
close to the noise floor. Even if the signal only has passed
through a digital mixer, or a DBMAX, for adjustment of level,
Dither should be applied if the succeeding device is of a lower
resolution.
Dither in the DBMAX is only applied to the Main digital
Outputs, and will not affect the analog Output signal.
Be sure to monitor the Output of the receiving device
(e.g. post DAT), to hear the final result.
Dither Resolution
The Output resolution of the DBMAX is 24 bit. When the
receiver of the DBMAX's signal has a lower resolution, Output
Dither must be applied in the DBMAX to equal the resolution of
the receiver.
Example: If the DBMAX is hooked up to a DAT via AES/EBU
or S/PDIF interfacing, the Output Dither of the DBMAX should
be set to 16 bit.
If the receiver is a HD editor capable of recording 24 bits,
DBMAX Dither should be turned off.
If the receiver is a HD editor capable of recording 16 bits, but
processing 24 bits all the way from the Input, Dither should
normally be turned off at the DBMAX, leaving the dithering to
be done within the HD editing system. If in doubt, try recording
a low level sine wave through the DBMAX with the Dither
switched off. For a 16 bit system, use a tone at e.g. -60dBFS.
Play it back adding a fair amount of digital gain (e.g. 40dB), and
listen for distortion. If distortion is heard, dither is not applied
internally in the HD editor, and you have to do it with the
DBMAX.
INPUT
I 1
I 3
I 2
EXPANDER
COMPRESSOR
LIMITER
OUTPUT
I 4
