Violectric dac v850 User Manual page 15

INPUT SELECTION
By pressing the "INPUT SELECT" button, the inputs USB > BALanced >
COAXial > OPTO can be selected in clockwise order.
If a valid signal is present at the corresponding input, the blue "lock"
LED will come up. Unused inputs or such with an invalid digital signal
present are indicated by the red "MUTE / ERROR" light.
RESAMPLING
Resampling is a mighty feature for the transformation/restoration of
jittered signals into high-quality signals. As well, the signal quality of
44.1 or 48 kHz sources can be improved by converting them to a higher
rate. This also complies to the USB input which often suffers from jitter
caused by improper treated computer outputs. With the aid of resamp-
ling process nearly all jitter (and not only specific ones) is removed from
the USB data stream without using "asynchronous USB mode" which is
nonetheless also a feature of the USB input.
This isn't mystery at all, but a feature offered by so-called sample-rate
converters - available since the nineties of the past century.
While early sample rate converters could provide conversion ratios of
1:2 to 2:1 at 100dB dynamic range only, ratios of 1:16 to 16:1 at 140 dB
dynamic range are feasible today.
In principle, the digital data stream is asynchronously disassembled by a
DSP specially developed for this purpose, and can be recombined at
virtually any sample rate desired.
The quality of this recombination is directly dependent from the SRC´s
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