User manual

Eclipse User Manual
Release 4.0.1 Page 23 of 66 Eclipse User Manual
We highly, highly, highly recommend that you refer to the “Eclipse
System Signal Flow” sheet (after the Index) to visualize where the
following adjustments are made. All references to the “meter” can be set at LEVELS METER (SOURCE).
LEVELS {IN-GAIN}
This is an analog voltage gain of –30dB to +10dB. It
comes before the ADC (analog to digital converter) and
affects signals supplied at the analog inputs only! Its effect can be monitored by setting
the meter to Analog In. It is advisable to leave this at 0dB and to optimize the input level
by adjusting the device connected to the analog inputs of the Eclipse. However, definitely
use LEVELS {IN-GAIN} should the connected device be constrained in some way.
LEVELS {OUT GAIN}
This is an analog voltage gain of –30dB to +10dB. It
comes after the DAC (digital to analog converter) and affects
the signals being sent out the analog output only! Note that
setting the meter to Analog Out shows the level before this
control, not after.
LEVELS page 2 {ANLG LVL}
Ah, we’ve included this digital gain of –144.5dB to 0dB
simply because we could. It comes after the ADC and
hence is in the digital domain. It affects only the level of
the analog input. But - you probably don’t want to use it! That’s right, leave it at 0dB
unless you feel you have a good reason to do otherwise, such as disabling the analog inputs
(use -100dB). To adjust the analog input level, you should instead use the above-mentioned
LEVELS {IN-GAIN}.
LEVELS page 2 {DIG LVL}
This is a digital gain of –144.5dB to 0dB. It affects sig-
nals supplied at the digital input only, and its effects can
be monitored by setting the meter to Digital In. It is advisable to leave this set to 0dB and
to optimize the input level by adjusting the device connected to the digital input of the
Eclipse. Only use LEVELS page 2 {DIG-IN} should that fail you.
LEVELS page 2 {MSTR OUT}
This is a digital gain of –144.5dB to 0dB. It affects the
signal at the output of the DSP, after the Wet/Dry mix
and before the DAC, and can be monitored by setting the meter to DSP-Out. Adjusting this
parameter will affect the signal level at both the digital and analog outputs. If you have
digital outputs, use this to optimize the signal being sent out of them.
For the “audio purists”: Assuming that you’re not clipping the DAC (you’d know you were if
you saw the
OVERLOAD LED light with the meter set to DSP-Out ), use LEVELS {OUT GAIN} if you
need to turn the analog output down, and use LEVELS page 2 {MSTR OUT} if you need to
turn the analog output up. Why? You want the highest signal possible going through the
DAC for maximum resolution with minimum noise.
 see page 8 for more about the Overload LED