41 lines
1.5 KiB
Markdown
41 lines
1.5 KiB
Markdown
---
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title: FOH Module
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---
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## Audio Mixer
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The Case 2.0 uses an Allen & Heath CQ-18T audio mixer because it's compact and has all important features we need, especially an automatic microphone mixer (AMM).
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It takes all four microphones, the speaker laptop's audio, and optionally a remote participant's audio and outputs a signal to the room's loudspeakers (PA), a signal for the recording, and optionally an "n-1 mix" for the remote participant(s).
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### Basic Signal Routing
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As mentioned before, we need to produce two main audio mixes: The recording mix and the room PA.
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Those two are basically the same signal, but we want to have the opportunity to add additional EQ to the PA and have additional compression on the recording mix.
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Therefore we need two separate mixes and can't just "clone" the main mix for both.
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The remote participant output is the same as the main/ recording mix, but without the input from the remote participant itself.
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Otherwise we would have built a feedback loop.
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### Inputs and Outputs
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We're mainly using input 1-8 for our needs:
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- Input 1 and 2: Wireless headsets microphones
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- Input 3 and 4: Wireless handheld microphones
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- Input 5 and 6: Laptop audio
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- Input 7 and 8: Remote participant audio
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- TODO:
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###
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## Audio De-Embedder
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The SDI audio de-embedder is used to extract the speaker laptop's audio from the "slides" SDI signal so that it's available in the audio mixer.
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This way we can:
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- inject the laptop audio to the loudspeakers in the room
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- adjust the audio level at a unified place (the audio mixer)
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## Wireless Microphones
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TODO
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