Audiolab 8300CD, User Instructions

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Page 8
6: Operation - 2
Playing a USB input
Install the Audiolab Audio Driver from the CD-ROM provided as accessory. The
installation instructions are burnt on the CD-ROM, please refer to the file when
installing the software. Connect your computer to 8300CD via USB cable (type A
to Type B), change the Play mode to USB input using the handset or the button on
the front panel.
“Unlocked” will be displayed if no input signal for USB. The Play with digital
inputs will lock onto the input data when there is an input signal for USB. The
display screen will then indicate the presence of a digital signal and show the
output sampling frequency of the music file in your computer.
If input sampling frequency is 384kHz, display shows PCM384 kHz.
If the format of music file is DSD64, display shows DSD2.8MHz.
If the format of music file is DSD128, display shows DSD5.6MHz.
If the format of music file is DSD256, display shows DSD11.2MHz.
Selecting the Display brightness level
Pressing the DISPLAY button on the remote control cycles through the display
settings.
Press the DISPLAY button to select between Display High, Display Low and Display
Off. Each press of the DISPLAY button will select the next display setting.
When the display is OFF: Pressing any key will momentarily switch the display on.
After a few moments the display will go off.
Note: switching the 8300CD off and on again restores the display setting to High.
Selecting a Digital Filter:
8300CD has 7 filters available for PCM audio. Press the FILTER key once to
display current PCM filter, Press the FILTER key again to change filters. Or press
MENU key to enter menu mode, press
or to turn menu to “Digital Filter”
page, press to enter filter page, press or again to select different
filters, press again to confirm chosen filter.
The “Optimal Transient” filters exhibit no ringing – the transient nature of
the music is preserved. Although exhibiting poorer performance in technical
measurements, sound from this type of filter has a purity and “naturalness” that
more than compensates for the lack of the technical specifications. There are
three Optimal Transient Filters. They exhibit identical frequency and time domain
response but the internal structure of the filters varies. Resulting in small but the
perceptibly different sonic nuances.
The “Sharp Rolloff” filter typifies industrial standard characteristics ( -6dB at 1/2
Fs with significant time-domain ringing ) and is included here for comparison
purposes.
The “Slow Rolloff” filter starts rolling off at a lower frequency then the Sharp
Rolloff filter but has a gentle rate of attenuation and significantly less “time-domain
ringing”. This filter is not recommended to use normally, unless the difital signal
from source is very poor can’t play with other filters.
The “Minimum Phase” filter has a gentle attenuation slope similar to the Slow
Rolloff option, however it exhibits no pre-ringing in the time domain. It can be
likened to an analogue filter applied in the digital domain.
The “Optimal Spectrum” filter implements sampling theory and is designed for
near perfect technical response in the frequency domain. This filter also has time-
domain pre-ringing which can lead to listener fatigue.
For DSD mode, there are four filters “Normal”, “50K”, “60K” and “70K” which
with cutoffs at 47k, 50K, 60k, 70k. End user can adjust the IIR bandwidth via
selecting different filters to get favorite sonic nuances.
The Audiolab products uniquely offer you a wide choice of filters to meet your
listening expectation.
6: Operation - 3
USB -28dB
Unlocked
USB -20dB
DSD 11.2MHz
Display High
Display Low
Display Off