I have a Biamp Nexia VC DSP, which has a Codec input and output on the back.

The manual doesn't say anything more than: "This plug-in barrier strip connector provides a balanced input for line-level audio signals from a codec."

I'm having a hard time wrapping my head around what a "Codec" is in this context.

The software gives me some control blocks, and I know it has something to do with video conferencing, but I have no idea how it's implemented, and googling "codec" is not helpful.

What do I plug into a codec input and output?

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  • What did Biamp have to say about this?
    – Mark
    May 20, 2020 at 8:11

1 Answer 1


Codec is a term used for "Coding" and "Decoding" of audio. You might use a codec when you are "encoding" your audio as another format for transmission over networks or other transport layers. You would take a line output format audio signal and connect it to a "codec" to transmit this audio to another location. Same on receive, except you use the input.

  • Can you give me an example then of what I would be wiring into the input of my DSP? As in what type of device?
    – ShemSeger
    May 20, 2020 at 15:15
  • 1
    Obviously, this I/O is dedicated to plug an hardware with analog audio interfaces that allows connection to a remote site. An example could be barix.com/sipopuscodec with line level I/O. But you could actually use this Nexio VC I/O to plug any line level audio equipment. Notice that on the Nexia TC, this I/O is replaced by a telephone interface, allowing the same functionality over a telephone line (POTS).
    – audionuma
    May 20, 2020 at 16:13
  • 1
    If you were to use an external videoconferencing solution, you might use the codec I/O to connect the audio I/O of the video conferencing device.
    – audionuma
    May 20, 2020 at 16:16

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