dCS
Vivaldi Upsampler User Manual
Software Issue 1.2x
December 2015
Vivaldi Upsampler Manual v1_2x
Page 24
English version
Power
Button
To switch on, ensure the rear panel switch is set to
I
and press the
Power
button (C) on the front
panel once. Note that the unit cannot be turned on from the remote control.
To set the unit to sleep mode, press the
Power
button once. The main display will turn off, the LED
(D) beside the button will light, and the digital outputs will mute, but the unit will remain close to
running temperature. Press again to return to normal operation.
To switch off, hold down the
Power
button for about 3 seconds until
SWITCHING OFF
appears on the
display, then release it.
When the menu is open, press the
Power
button to close the menu.
When the browser is open, pressing the
Power
button briefly closes the browser and returns the front
panel controls to their normal function.
Menu
Button
Press the
Menu
button (E) to open the menu, select menu pages and change settings. See the Menu
section on page
29
for information on using the menu features.
When the
USB2
input is selected and media connected, hold the
Menu
button down for 2 seconds to
open the browser (see page
17
). Use the
Menu
button to change to a sub-directory or select a file to
play.
Filter
Button
(F) The optional Filters give different trade-offs between impulse response and aliasing.
For most conversions, only
Filter 1
is available - a classic sharp filter. The amplitude is reduced by
0.1dB to match the other filters.
The best filter setting is a personal choice and may be related to the type of music.
The table below shows how many filter choices are available for each input / output combination.
OUTPUT RATE
32k 44.1k 48k 88.2k 96k 176.4k
192k 352.8k 384k DSD
INPUT RATE
32k
1 1 1 1 1 1 1 1 1 1
44.1k
1 2 5 2 5 2 6 2 6
48k
1 1 4 1 4 1 1 1
88.2k
1 1 1 1 1 1 4
96k
1 1 1 1 1
1
176.4k
1 1 1 1
1
192k
1 1 1
1
352.8k
1 1
384k
1
DSD
1 1 1 1
1
For conversions with 2 filters (currently all of these have a 44.1k input rate):
Filter 1
is a classic sharp filter.
Filter 2
is a very steep, long asymmetrical (sometimes called apodizing) filter which starts rolling off at
20kHz. This filter has no energy left in the output to exercise the DAC’s filter, so there is no pre-ringing
from the source and the DAC. This will improve the response of the DAC’s reconstruction filter by
removing some high frequency components that typically cause images in half-band filter DACs.
For conversions with 4 filters:
Filter 1
has the sharpest cut-off, and so has the poorest impulse response (transient performance) but
the best alias rejection (removal of out-of-band frequencies).
Filters 2
,
3
and
4
have progressively gentler cut-off, with less alias rejection.
For conversions with 5 filters (currently all of these have a 44.1k input rate):
Filters 1 – 4
are the same as for conversions with 4 filters.
Filter 5
is an asymmetrical design with non-linear phase and no pre-ringing.
