Bass and Treble Control
For optimum audio quality, the audio input levels and the bass and treble controls must all
be set up properly. Input audio levels may need to be adjusted depending on the variation
of the output levels from different source devices.
NOTE:
By default these levels are set for the consumer product level of
-10
dBV.
Bass and treble should be adjusted once the input and output levels have been adjusted.
These are adjusted by configuration software only, with a range from
-24
dB to
+12
dB.
By default the bass and treble have been set at
0
dB.
VoiceLift Level Adjustment
To adjust VoiceLift microphone levels, press the
VoiceLift
adjustment buttons (in 1 dB
steps) from
-18
dB to
+24
dB, default is
0
dB.
While speaking into the microphone, increase the gain until the
Normal
LED is lit and the
Peak
LED only lights occasionally.
PEAK
NORMAL
SIGNAL
Signal threshold;
raise input gain.
Level has been
properly adjusted.
Level set too high,
lower input gain.
AUDIO LEVEL ADJUST
PEAK
NORMAL
SIGNAL
INPUT
PEAK
NORMAL
SIGNAL
VOICELIFT
PAGING
SENSOR
Figure 11.
Front Panel VoiceLift Mic Peak/Normal/Signal LEDs and Adjustment
Buttons
The VoiceLift microphone receiver input signal is not affected by the system volume
adjustment and tone control via SIS or an MLC controller attached to the switcher. The
VoiceLift audio channel is always active, and it is independent of the selectable audio
inputs (1 to 7).
The VoiceLift microphone receiver input audio can be heard throughout a presentation,
whether or not audio from the selected input (1 to 6) is active or muted.
NOTE:
The
1Z
SIS command mutes all embedded audio on the HDMI, line out and
amplifier outputs.
The VoiceLift microphone input can be muted via a separate SIS command (see
starting on page 19 for details).
11
PVS 407D Switcher • Operation
17
