Downmix Audio Input - AMX DGX1600-ENC Hardware Reference Manual

Digital Signal Processing
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).

Downmix Audio Input

In sound recording and reproduction, downmixing 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.
Downmixing is the process of combining those audio channels to produce one or two channels that include all content.
Audio Switching Board Downmix Input
Audio Switching Output Boards provide the ability to downmix the audio signal from one HDMI input (must be assigned as the
downmix 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 downmixed input is fed from a single selectable embedded audio input from any Enova DGX Input Board. Downmixed audio
from a single input can be switched to any or all embedded or auxiliary audio outputs.
Supported Downmix 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

Routing the Downmix Input
The downmix input is selected from the available audio inputs and is routed the same as any other audio input to any or all outputs
(for general switching and configuration instructions, including the downmix input, see page 166).
Downmix SEND_COMMANDs
The downmixed audio input uses a subset of the SEND_COMMANDs available for Audio Switching Boards (see below). For details on
each of the SEND_COMMANDs that work with the downmixed audio input, see the Audio Input SEND_COMMAND section on
page 202.
AUDIN_STATUS

AUDIN_GAIN

AUDIN_STEREO

AUDIN_COMPRESSION

AUDIN_COMPRESSION_ATTACK

AUDIN_COMPRESSION_RELEASE

AUDIN_COMPRESSION_RATIO

AUDIN_COMPRESSION_THRESH

NOTE: To negate a downmix command, reroute the switch.
Hardware Reference Manual – Enova DGX 100 Series Digital Media Switchers
Audio Adjustment Parameters
Available test tones:
• 60 Hz
• 250 Hz
• 400 Hz
• 1 kHz
• 3 kHz
• 5 kHz
• 10 kHz
• Pink noise
• White noise
Enova DGX Audio Switching Boards
152