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dCS Rossini Upsampling Network DAC User Manual
AUDIO SETTINGS Menu
Phase
Use this page to change the phase of all the analogue outputs from normal phase...
...to inverted phase, to correct for absolute phase errors on recorded music. This icon is
displayed when the outputs are inverted. Phase is reset to normal to power up.
Filter
The Rossini DAC features two sets of digital filters: one set for PCM and one set for
DSD. The PCM Filter is applied when the unit is receiving PCM data. Filters are a
personal choice.
The DAC remembers the last filter set for every sample rate.
The first 4 PCM filters give different trade-offs between the Nyquist image rejection and
the phase response.
the sharpest roll-off, resulting in the poorest transient response of the four. Filters 2, 3
and 4 have progressively more relaxed image rejection and progressively better
transient response.
Filter 4
are often used for rock music.
If the source data rate is 176.4, 192, 352.8 or 384kS/s, two extra filters are available.
Filter 5
has a Gaussian response (which has no overshoot on transients, with a relaxed
roll-off) and
There are 2 extra filters for 44.1kS/s operation also.
with non-linear phase and no pre-ringing.
phase and pre-ringing. Try them and decide for yourself which you prefer.
While receiving and decoding MQA format data,
6 other filters. This is the recommended filter for MQA. The MQA filter setting is stored
separately as if it were an extra sample rate.
DSD Filter
The DSD Filter is applied when the unit is receiving DSD data or when the DSD
Upsampling feature is active. While upsampling PCM data to DSD or DSDx2, both filters
are active, but only the PCM Filter setting appears on the display.
DSD mode has 5 filters, the first 4 progressively reduce the out-of-band noise level
(which is inherent in the 1-bit nature of DSD).
widest bandwidth (90kHz for DSD/64) and the highest level of out-of-band noise. If your
system sounds harsh, try
band noise level at the cost of some bandwidth.
troubleshooting, not listening, as it cuts off sharply (above 25kHz for DSD/64) to
minimise the out-of-band noise.
response – this also removes much of the out-of-band noise.
Rossini DAC Manual v2_0x
Filter 1
has the best rejection of (unwanted) Nyquist images and
Filter 2
is often preferred for orchestral music, while
Filter 6
is an asymmetrical type (which features almost no pre-ringing).
Filter 2
Filter 5
Filter 5
Filter 6
is a new sharp filter which has linear
Filter M1
Filter 1
is the usual setting – it gives the
or
Filter
3. These progressively reduce the out-of-
Filter 4
has a relaxed roll-off with a smoother phase
Page 40
Software Issue 2.0x
December 2018
Filter 3
is an asymmetrical design
may be selected in addition to
is primarily intended for
English version
and
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