NewTek TriCaster 40 - Manual (Page 43)

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3.9 AUDIO CONTROL
The Audio Mixer tab (Figure 68) is home to all of the controls required to manage both audio input and output.
Controls are for each individual audio input, source, or output stream, whether external or internal.
Figure 68
External audio connections and configuration were discussed back in Section 2.3.2. These sources include
controls for the two analog audio inputs (Input 1 and Mic) along with controls for both Network inputs (such as
an Apple AirPlay® source).
Besides external audio sources, sounds played from TriCaster’s internal storage volumes (including removable
media such as external hard drives or ‘thumb’ drives) via the Media Players can be added to the output mix.
Separate sub-panels are provided to control audio added to TriCaster’s Program Output mix by the DDR and GFX
players.
3.9.1 AUDIO LEVELS
TriCaster’s analog audio conforms to SMPTE RP-155. The maximum input/output level is +24 dBu. Nominal
input level is +4 dBu (-20dB FS), and the sample rate is 48 kHz. Levels above 0dB are shown in red in the VU
meters, to caution you that overly high levels can result in clipping in recordings.
Hint: An error message appears in the Status Bar above the main Program output monitor to warn you if clipping
occurs.
VU METERS AND GAIN
A large portion part of both audio mixers is devoted to VU (Volume Unit) meters. These displays vary depending
on the source type. For Input 1, the meter displays the levels for the two analog input channels, controlled by a
single Gain knob, with a Balance control above. Other sources may display a single channel VU meter.