Input And Output Digital Signal Processing; Stereo Audio; Down-Mix Audio Input; Audio Switching Board Down-Mix Input - AMX Enova DGX 100 Series Hardware Reference Manual

Input and Output Digital Signal Processing

Input and Output Digital Signal Processing
Digital Signal Processing
Output Volume
Volume Limiter
Mute
Input Gain
EQ Gain
Compression (Enable/Disable)
Delay
10-Band Parametric Equalizer
Preset Filter Types
Band Gain
Band Q
Tone
Balance
Tone Generation
(may be switched to one
or more audio outputs)
NOTE: Configuration data is not affected by firmware upgrades.

Stereo Audio

Audio on Audio Switching Boards can be processed as a stereo audio pair. Stereo audio input channels are paired (left
and right) to present the grouped output on both output channels (left and right).

down-mix Audio Input

In sound recording and reproduction, down-mixing is the process by which multiple recorded channels are combined
into one or more channels.
In multi-track recording, multiple sound sources are recorded from separate microphones to individualized audio
channels. down-mixing is the process of combining those audio channels to produce one or two channels that include all
content.

Audio Switching Board down-mix Input

Audio Switching Output Boards provide the ability to down-mix the audio signal from one HDMI input (must be assigned as
the down-mix input) to stereo audio. While the sample rate can be any valid rate, the data will be sample rate converted
to 48 kHz. The resulting audio can be routed to any or all of the analog or digital audio outputs.
The down-mixed input is fed from a single selectable embedded audio input from any Enova DGX Input Board. down-
mixed audio from a single input can be switched to any or all embedded or auxiliary audio outputs.

Supported down-mix Input Formats

Dolby TrueHD

Dolby Digital Plus

Dolby Digital

DTS-HD Master Audio

DTS-HD High-Resolution Audio

DTS

2 CH through 8 CH L-PCM

Enova Digital Media Switchers - Hardware Reference Manual
Audio Adjustment Parameters
-100 dB to 0 dB (attenuation)
Programmable minimum and maximum volume limits
Mute function on each output path
• When a muted output is un-muted, the output returns to its previously un-muted volume
• When a volume command is sent to a muted output, the output remains muted; when the output is
un-muted, the volume returns at the new level
-24 dB to +24 dB
• Allows source signals of varying amplitudes to be equalized
• Inputs are set to unity gain at the factory
Note: Make input gain adjustments before fine tuning the outputs.
-12 dB to +12 dB
Audio inputs (when enabled) can be independently configured for the following settings:
• Attack from 1 to 2000 milliseconds
• Release from 10 to 5000 milliseconds
• Threshold of -60 dB to +0 dB
• Ratio 1 to 20
0 to 200 milliseconds (each audio signal independently)
Selectable center frequency for each band independently
• Used to boost or cut the frequencies for each output
• Each equalization band spans one octave and is identified by its center frequency
• Bands are set for a flat response (0 dB) at the factory
Available preset filter types (apply to each band independently):
Bell, Bass shelf, Treble shelf, Low pass, High pass, Band pass, Band stop,
-12 dB to +12 dB
0.1 to 20
Available types of tones:
Off (default), Voice, Music, Movie
Note: The tone adjustment is applied on top of the equalizer adjustments.
Balance level can be set from -20 to +20, left to right (default value is 0)
Available test tones:
60 Hz, 250 Hz, 400 Hz, 1 kHz, 3 kHz, 5 kHz, 10 kHz, Pink noise, White noise
ASB Audio Switching Boards
173