Esoteric OP-DAC1, Owner'S Manual

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Setting mode
When an OP-DAC1 optional board is installed, the following
items are added to Settings Menu 1.
PCM digital filter
PCMF>***
This setting turns the digital filter for PCM input signals sent to
the D/A converter on or off.
o
By default, the setting is OFF.
OFF
The digital filter for PCM playback is disabled.
FIR1
An FIR filter with a steep roll-off is used to sharply cut signals
outside the audio band.
FIR2
An FIR filter with a slow roll-off is used to gently cut signals
outside the audio band.
SDLY1
A short delay filter with a steep roll-off is used to sharply cut
signals outside the audio band.
SDLY2
A short delay filter with a slow roll-off is used to gently cut
signals outside the audio band.
DSD digital filter
DSDF>***
This setting turns the digital filter for DSD input signals sent to
the D/A converter on or off.
o
By default, the setting is OFF.
OFF
The digital filter that cuts signals above 50 kHz is disabled.
ON
The 50kHz cutoff digital filter is used.
o
Use this setting if modulation noise, for example, occurs
when set to OFF.
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