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Amulet Hotkey K4u
+
Manual
7. 3 Audio switching and mixing
You can set up the K4u
+
to switch or mix the stereo audio output
from each attached computer through to the common audio
output on the K4u
+
front panel.
When audio is mixed, the user hears sounds originating from
any of the attached computers, regardless of which channel has
keyboard and mouse focus. To set up audio mixing, set DIP
switch A4 to ON.
When audio is switched, the user only hears sounds from the
computer that has keyboard and mouse focus. To set up audio
switching , set DIP switch A4 to OFF.
You can also mute (or unmute) audio using hot keys:
■ To mute a single channel
(Available in mixed audio mode only.) You can mute a
channel to prevent its audio signal mixing into the K4u
+
audio
output. You can mute as many channels as you want.
a. Switch to the channel you want to mute.
b. Press the hot keys + Backspace.
To unmute a channel, simply repeat the procedure.
■ Mute all audio output from the K4u
+
To turn off or mute all audio, press the hot keys + 0 (zero on
the QWERTY section of the keyboard).
When the K4u
+
is muted, the focus LED on the front of the
unit will flash.
To re-enable audio, press the hot keys + 0 again; the focus
LED stops flashing.
For DIP switch details, see section 3. For hot key details, see
section 4.
Note:
Audio settings made with hot-keys are lost during a
power cycle of the unit. Also, the ‘mute all’ option does not
affect the internal beeper on the K4u
+
.
7. 4 Synchronize screen savers
By activating the SaverSync™ feature, you can synchronize
screen savers on attached USB computers so they only activate
when all keyboard and mouse activity through the K4u
+
has
stopped.
Instructions for activating SaverSync are in section 6. 3.
7.4.1 Why is SaverSync needed?
When multiple computers are attached to a K4u
+
switch,
the screens for these computers remain connected and visible.
The user can therefore see at least four video displays at any
time. Typically, the user needs these video displays to be
constantly visible and not blanked by a screen saver. Therefore
the screen savers on computers attached to a K4u
+
are often
disabled.
However, some organisations have a security policy that insists
screen savers remain active. This can adversely affect
employees using a K4u
+
if vital data is suddenly hidden. For
example, if a user works on a single attached computer for a
long period, other computers attached to the K4u
+
are left idle.
Consequently, the screen savers will activate on these idle
computers so their video displays are no longer visible, even
though the user is still working at their desk. SaverSync fixes this
problem.
7.4.2 How does SaverSync work?
When SaverSync is enabled, it monitors keyboard and mouse
activity through the K4u
+
. While it detects activity, SaverSync
continually signals all attached computers to reset their screen
saver timeout counters. This prevents the screen saver from
activating.
When keyboard and mouse activity stops and data is no longer
passing through the K4u
+
, the screen savers operate as normal,
activating after the associated timeout expires.
Note that screen saver activation occurs at the operating system
level and has no impact on applications running on attached
computers. Also, SaverSync does not compromise K4u
+
security
in any way. The user’s key press codes and mouse movement
data are sent only to the computer attached to the active
channel.
Note:
SaverSync only operates with computers using USB
connections to the K4u
+
.
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