dCS Debussy DAC User Manual Software Issue 2.2x
August 2013
Debussy DAC Manual v2_2x.docx Page 15 English version
FRONT PANEL
Figure 6 – Front panel
POWER Button
To switch on, ensure the rear panel switch is set to I and press the POWER button (A) on the front
panel once. The LED to the left of the POWER button will illuminate. Note that the unit cannot be
turned on by remote control.
To set the unit to sleep mode, press the POWER button once. The LED to the left of the button will
dim, the other LEDs will turn off and the analogue outputs will mute, but the unit will remain close to
running temperature. Press the button again to return to normal operation.
To switch off completely, hold down the POWER button for at least 3 seconds then release it.
VOL+/- Buttons
The digital volume control covers a range from -60dB0 to 0dB0 in 0.5dB steps. Press or hold down the
Vol+ button (B) to increase the volume, press or hold down the Vol- button (C) to reduce the volume.
The Ring DAC™ circuit has linearity to spare but for best results, set up your system to use a volume
setting between -20dB and 0dB for normal listening. While the volume is being adjusted, the Sample
Rate LEDs (K) indicate the approximate volume setting in 10dB steps.
MUTE Button
Use the MUTE button (D) to mute the analogue outputs. When the unit is muted (either manually or
when not locked to a source) the LED to the left of the button illuminates.
FILTER Button
Use the FILTER button (E) to select your preferred anti-image filter. The two filters have very similar
amplitude responses but different phase responses.
If the indicator to the left of the button is off, the filter applied is a classic sharp filter, with linear phase
and pre-ringing. Press the button to change to the alternative filter, which has non-linear phase and no
pre-ringing. The indicator illuminates when the alternative filter is selected.
Filter choice is a personal preference and is best done by ear. The choice of filter may depend on the
type of music you are listening to. The DAC remembers the last filter selection for every sample rate.
PHASE Button
If the indicator to the left of the PHASE button (F) is off, all analogue outputs will be in absolute phase
with the digital data. Press the button to reverse the phase of all outputs - the indicator illuminates to
warn of this. This feature is useful for correcting the playback of tracks that have been recorded in
reverse phase.
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