Resonessence INVICTA User Manual page 17

• Resonessence designed, Minimum Phase Slow
Roll-off.
On the OLED display panel this appears as
"Minimum Phase Slow Roll-Off"
This is a FIR filter that exceeds the specification
of the above IIR filter achieving -100db stop
band. It is not a linear phase filter because it has
non-symmetric coefficients but has been
designed to exhibit virtually no pre-ringing (but
it does have some) with the minimum of
dispersion.
• Resonessence designed, Linear Phase
Apodizing Filter.
On the OLED display panel this appears as
"Linear Phase Apodizing"
Perfectly symmetrical impulse response, hence
linear phase and non-dispersive, this filter
achieves a high -96db rejection at fs/2 and
exhibits the minimum of pre-ringing possible
while achieving this excellent rejection. This is
the preferred filter of many of our beta-testers.
• Resonessence designed, Linear Phase Fast
Roll-off
On the OLED display panel this appears as
"Linear Phase Fast Roll-Off"
The ultimate FIR filter in the 'classic' linear
phase category. This filter delivers ultra-high
suppression of -120db and extreme flatness in
the band. It exceeds the performance of the
Sabre DAC pre-installed Fast Roll-off filter.
• Resonessence designed, Linear Phase Slow
Roll-off
On the OLED display panel this appears as
"Linear Phase Slow Roll-Off"
Designed as an enhanced version of the pre-
installed Sabre DAC Slow-roll off filter, this is a
linear phase, hence non-dispersive, low group
delay filter that has less ripple in band and
higher rejection that the Sabre Slow Roll-off
filter
Appendix C
Using Direct Stream Digital
with INVICTA
Version 4.2 and later of the software
provides DSD (Direct Stream Digital)
modes of operation.
DSD music files in DSF and DFF format,
(these are file formats commonly used to
store DSD data) are read from the SD
Card and DSD over PCM (DoP) is
supported via the USB Audio 2.0.
Playing of DSD from the SD Card slot is
straightforward: simply select the DSF or
DFF file and initiate playback. INVICTA
will switch internally to DSD mode
automatically. We support DSD64 and
DSD128.
Playing of DSD from a computer via
USB requires additional software on the
computer and Resonessence shows an
example of how to configure Audirvarna
on our WWW site at:
http://resonessencelabs.com/dsd-over-pcm/