A U D I O P H I L L E O 1 & 2 U S E R M A N U A L
10
Advanced Audiophilleo1
Features
hese features are available in the Audiophilleo1 only. The following
information is intended to augment the Audiophilleo1 online help system. To
obtain online help, simply push and hold the joystick for 1 second on any
screen.
Dithered Volume Control
The Audiophilleo1 support volume attenuation of 0dB to -72dB. Setting the volume is
done using the computer volume control. Our volume control uses a sub nyquist
dither noise in order to decrease audible hiss.
For safety the user may configure the maximum allowed volume. The computer will
think that the volume can be set to 0dB but the Audiophilleo1 will only allow it to go
up to the desired maximum.
The user may also lock the volume at the current setting. This can be useful when
using an external analog volume control. The computer will think that it can set the
Audiophilleo1 volume but the Audiophilleo1 will simply ignore it.
Finally, "Pro mode” can be enabled. This causes the Audiophilleo to ignore the
computer's requested volume level. The Audiophilleo does not send volume
commands to the computer and sets the volume level only internally. This allows for
more accurate dB steps to be used since the computer no longer decides the step size.
Since the computer no longer controls the volume, this mode requires the joystick or
remote control feature to be used in order to change ap1 volume.
Note
: The computer remembers the last used volume level when rebooting or re-
plugging a USB audio device. Under windows there is a bug which causes this to not
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