Getting Started
This article explains the different types of audio input support across Avonic camera models and how to properly connect and configure them.
TABLE OF CONTENTS
- Getting Started
- Audio Support by Camera Model
- Audio Delay Setting (CM70/CM90)
- Audio Limitations on USB Output (CM70)
Audio Support by Camera Model
Check the datasheet of your camera for the audio support. There are 3 option.
No Audio Input
For example the CM41 and CM44 does not support audio input or audio embedding on any output.
3.5mm Line-in Audio
For example the CM40 features a 3.5mm audio Line-in jack for embedding audio into HDMI and SDI outputs (not USB). It supports only line-level signals and does not include a built-in microphone preamp.
Audio can be enabled/disabled and configured via the camera web GUI or HTTP API. Settings include sample rate, bitrate, delay, and input volume.
Balanced Audio Input
For example the CM70 and CM 90 series supports a balanced audio Line-in via a 5-pin Phoenix connector. Audio is embedded into the IP stream, HDMI, and SDI outputs (not USB).
Audio can be enabled/disabled and configured via the camera web GUI or HTTP API. Settings include sample rate, bitrate, delay, and input volume.
Required Components
- Dual XLR male to 5-pin Phoenix connector (e.g. CTBP92HE/5)
- Audio mixer or interface with XLR output
- PoE network cable for IP streaming
Wiring Instructions
- Connect the XLR cable to the XLR connectors as shown in Picture 1. The connector backs are mirrored.
- Connect the cable to the Phoenix connector according to Picture 2.
* Cable wire colors may vary. Identify left, right and ground (GND) wires before connecting.
Audio Delay Setting (CM70/CM90)
In the CM7x series, the audio delay can be configured in the camera web GUI under the Audio tab. Adjustable from 0 to 200 ms.
Audio Limitations on USB Output (CM70)
The CM70 embeds audio only into IP, SDI, and HDMI outputs—not into USB output. This may affect use in video conferencing setups that require an external microphone over USB.
Alternative Solutions:
- Connect a USB microphone directly to the laptop running the video conferencing application.
- Use the Avonic UEX150 USB 2.0 Extender to bridge longer distances and provide an extra USB port on the receiver side.
- Use the HDMI output of the camera and connect it to a CAP100 HDMI to USB 3.0 capture device. This will deliver uncompressed video and embedded audio to the laptop.
- Consider the CM70-NDI which allows streaming via NDI and using the NDI Webcam Input tool to emulate USB video input with audio.
More information on NDI tools can be found in this article on the Avonic Knowledge Base.