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SECTION 15.1 AUDIO SPECIFICATIONS
TriCaster’s analog audio conforms to SMPTE RP-155. The maximum input/output level is +24 dBu. Nominal
input level is +4 dBu (-20dBFS), and the sample rate is 96 kHz. Levels above 0dBVU 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 – see Section 7.3; see also Section 15.7 (Advanced Configuration) and Section 15.8.1
(Headroom Notes).
SECTION 15.2 HEADPHONES
At the extreme left side of the Audio Mixer you will observe a simple
volume control for the Headphones output. By default, headphones
connected to this stereo output jack will carry the audio signal from the
output designated Master 1 – that is, the same audio carried by outputs
marked 1a and 1b in the Audio Out group on TriCaster’s backplane.
Remember that this output is also affected by source Solo switches. When Solo is
enabled for one or more sources – or outputs – only the soloed sources are sent to the
connector. (See Solo in Section 15.5.3 for more information on this feature.)
SECTION 15.3 VU METER CALIBRATION
VU (Volume Unit) meters are located right above the Volume control sliders throughout the Mixer. The
calibration of the VU meters can be changed to suit your preference.
Click the label below the Mute button in the Headphone control at left to open a small menu
offering three options as follows:
dBVU – most familiar to users of typical analog audio mixers
dBFS – dB ‘Full Scale’ – the digital standard; see notes under the heading Audio
Headroom in Section 3.12
dBu – based on a voltage of 0.775 VRMS (a shy scale rarely seen in public, supplied for
completeness, comparison, and the amusement of audiophiles)
SECTION 15.4 EXTERNAL SOURCES
Columns in the first set of control groups are labeled for correspondingly numbered Input rows on TriCaster’s
rear connector panel (right-click to Rename audio inputs).
You may choose to think of these audio sources as being associated with the same-numbered video inputs in
the nearby rows on the rear connector panel. This linkage is not strictly enforced, however. You can connect
directly to a different external audio source in the Advanced Configuration panel (see Section 15.7). Also, you
may well prefer to treat various audio sources as independent of the nominally associated video input. The
Follow (audio follows video) features play an important role in this context – see Section 15.7.5.
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