Ncast telepresenter reference manual – NCast Telepresenter M4 User Manual
Page 73
NCast Telepresenter Reference Manual
Audio Gain Charts
Mic Gain
Amplification
0
Mute
10
-18.0
20
-16.5
30
-13.5
40
-12.0
50
-9.0
60
-7.5
70
-4.5
80
-3.0
90
0
100
1.5
Line-in Gain
Amplification
0
Mute
10
-6.0 dB
20
-4.5 dB
30
-1.5 dB
40
0.0 dB
50
3.0 dB
60
4.5 dB
70
7.5 dB
80
9.0 dB
90
12.0 dB
100
13.5 dB
Output Gain Output Level
0
Mute
10
-37.3 dBu
20
-33.2 dBu
30
-28.8 dBu
40
-24.9 dBu
50
-19.3 dBu
60
-14.9 dBu
70
-10.7 dBu
80
-6.3 dBu
90
-1.9 dBu
100
2.6 dBu
6.1.15. USB (XLR) Audio Input and Output
The USB Matchbox from Henry Engineering
is a high-
performance, ultra-low-noise audio interface which supports industry standard balanced XLR connectors for
line-level audio input and output. Microphone input is not supported.
Using an input device such as this both improves audio quality and allows easier audio cable interface with
professional sound systems.
The system detects an attached USB Matchbox on boot (hot-plug is not supported). If the USB device is
present a new option "Audio Device" is added to the "Sources" tab. The user can switch between the internal
AC97 and USB audio codec at any time. The audio device will be changed immediately.
When the user selects the USB device, audio samples are captured and played back using the USB
interface. In this configuration some audio settings will disappear from the "Sources" tab: audio input, audio
mic-gain and audio line-in gain. The audio output gain setting is shared between the two devices.
6.1.16. Video Adjustments - Brightness, Contrast, Saturation, Hue, Sharpness
These values allow fine tuning of image brightness, contrast, saturation, hue and sharpness. The following
table shows the allowable ranges of adjustment:
Control
Range
Brightness
0-100
Contrast
0-100
Saturation
0-100
Hue
0-100
Sharpness
0-44
NCast Corporation
Revision 2.2
Page 73