DTP CrossPoint 4K Series Matrix Switchers • Matrix Software 87
Line audio input signal controls (see figure 42 on page 83,
A
)
The program audio input signal processor chain makes adjustments to program audio
material before it is tied to specific outputs.
Gain control block — The always-present gain control provides
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left and right channel controls to adjust the audio level of each input
through a range of -18 dB to +24 dB to set input gain levels for
optimal signal to noise ratio.
Click and drag the desired fader (
1
) or click in the dB field (
2
) and
enter a value. The meter value displayed in green shows the signal
level in dBFS.
3
Audio Format drop-down menu —
Use this control to select the audio
format:
• Analog — Audio on the local audio input (captive screw)
connector (see item
G
on page 12) is processed within
the DSP.
• Digital — Embedded audio on the HDMI or DTP input is
handled as follows:
• LPCM format — Audio is de-embedded and
processed within the DSP.
• Any other format — The original digital audio is not de-embedded and is not
routed into the DSP. No audio is available on the analog audio output (captive
screw) connector (see item
J
on page 13).
• Auto — Audio is automatically selected between the digital and analog inputs, with
the digital input having priority. When the Detected Format field (
4
) displays either
None or Multi-Channel, the analog input is automatically selected.
Based on the selection made in this box, when the dialog box is closed, the Gain block
reports Auto Gain, Dig Gain, or Ang Gain.
4
Detected Format: field — This field displays the detected digital
audio format. The displayed format can be either:
• None — No digital signal format is detected. This may be due to a source device
being switched off or not connected. Some digital audio players may not output a
detectable signal (or no digital audio clock) when paused or stopped.
• Analog input audio passes through the DSP to any output when Audio Format
(
3
) is set to Analog or Auto.
• Digital input audio is not passed to any output.
• 2-Ch LPCM — The detected format is uncompressed digital audio, in stereo or
2-channel format. This does not include Dolby or DTS stereo formats, as these
audio formats are encoded.
• LPCM input audio passes through the DSP to any output when Audio Format
(
3
) is set to Digital or Auto.
• Embedded LPCM input audio passes directly to an HDMI or DTP output,
bypassing the DSP, if the Output Signal Source control in the Volume block
of that output is set to Original (see item
6
in Output signal processor
chain Volume controls on page 103).
• Analog input audio is not passed to any output.
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