A U D I O P H I L L E O 1 & 2 U S E R M A N U A L
13
VirtualCable
VirtualCable allows the audiphilleo1 to change the edge transition speed of the SPDIF
electrical signal between <700ps and 15ns in 5 steps. This is similar to changing
SPDIF cables for the purpose of affecting the sound.
We only care about overlapping waves when the DAC is measuring the digital signal
level transition. So, if there is a reflection that is causing a problem at that particular
instant, we can move this transition in time, away from the reflection. The DAC can
then measure the transition perfectly without interference from the reflection, allowing
it to recover a less jitter clock. Most importantly, you can make these changes instantly
via remote control so that you can hear any difference immediately from your listening
position.
The VirtualCable feature is in the settings->SPDIF->VirtualCable menu. The joystick
may be pushed up/down in order to select any of the following levels:
Level
Edge Transition Time
0
<700ps transitions
1
1.2ns transitions
2
4ns transitions
3
7ns transitions
4
11ns transitions
5
15ns transitions
Note that a faster edge transition makes it easier for the DAC to recover a jitter-free
clock. We therefore recommend setting 0 as the optimal setting. However, it is
possible that reflection problems may cause settings 1 through 5 to sound better.
You may access this menu directly from the remote with the “VirtualCable” command.
Most importantly, while in this menu, you can set the level instantly via remote control
buttons 0 through 5 so that you can hear any difference immediately from your
listening position.
