Audio
Audio
- Go to Setting->Video/Audio->Audio
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Item
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Description
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Channel
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CH1~CH4
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Audio input
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HDMI or Line-in(3.5mm only) Or Audio Mix
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Samples
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48000
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Codec type
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G.711A/G.711U/AAC; AAC should be enabled by default if it's needed to push live video to YouTube, or else it might cause failure of streaming, that's required by YouTube.
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Bitrate
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48K, 64K, 128K, 256K
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Channel
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Stereo/Mono
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Output volume
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0~100 (For intercom only)
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🧙TIPS:
- If you wish to switch the audio input from HDMI to Line-in or Line-in to HDMI while streaming to YouTube, it may be necessary to reboot the device. Rebooting the device can ensure that the change in audio input is recognized and properly activated, allowing for seamless streaming to YouTube with the desired audio input source.
- If you need to push live video to YouTube, it is essential to ensure that AAC is enabled by default. Failure to do so may result in streaming issues and could potentially lead to the failure of the streaming process on YouTube. YouTube's streaming requirements include the use of AAC as the audio codec for live video streaming.
- Generally, 3-pole TRS connectors are suitable for GK72 & Pro Encoder Series, MC30 Encoder Series, and TV30 Codec Series. These connectors are commonly used for stereo audio signals and carry left and right channels, as well as ground. Conversely, 4-pole TRS connectors are appropriate for SS50 Codec Series and SS52 Encoder Series, and are often used for carrying stereo audio signals as well as a microphone input. In addition to left and right channels, 4-pole TRS connectors also include an additional pole for microphone or other audio input. For more details, please refer to Model Comparison.
- If that's TV30 CODEC SERIES, CH1 may not be accessible if all decoding channels are already in use.
What's Audio Mix?
Audio mix refers to the process of combining multiple audio sources or tracks into a single audio output. When combining audio from HDMI and 3.5mm Line-In sources, it typically involves blending or mixing the audio signals from these sources into a single composite audio stream.
For example, in a multimedia or audiovisual setup, such as a presentation or video conference, you may want to combine the audio from a video source connected via HDMI with another audio input from a separate device using a 3.5mm Line-In connection. This could be achieved by using an EXVIST HDMI video encoder with the latest firmware released around December 2023.
What's Active Audio?
Active audio typically refers to audio components or devices that require external power to operate. In the context of audio equipment, "active" generally refers to devices that contain built-in amplification or signal processing capabilities, which necessitate an external power source to function. This includes powered speakers, amplifiers, mixers with built-in preamps, and active audio interfaces.
What's Passive Audio?
Passive audio typically refers to a type of audio signal or system that does not require external power or an active amplifier. In the context of speakers, a passive speaker does not have a built-in amplifier and relies on an external power source, such as a separate amplifier, to drive the audio signal and produce sound.
Available Models of Audio Mix
TV30 CODEC SERIES
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Part Number
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Part Name
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1080P Basic HDMI Encoder|Decoder w/HDMI Loopout, USB2.0 for Recording
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1080P WiFi HDMI Encoder|Decoder w/HDMI Loopout, USB2.0 for Recording
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1080P PoE HDMI Encoder|Decoder w/HDMI Loopout, USB2.0 for Recording
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1080P Basic HDMI Encoder|Decoder w/Screen, HDMI Loopout, USB2.0 for Recording
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1080P WiFi HDMI Encoder|Decoder w/Screen, HDMI Loopout, USB2.0 for Recording
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Encoding|Decoding
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Max. 2ch encoding & decoding, including 1ch HDMI input, up to 3ch decoding input
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HDMI Input
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Max. 1920*1080P@60FPS, Encoding Up to 30FPS ONLY
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Frame Rate
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Up to 25/30, Configurable
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Decoding Input
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Max. 1ch 4K or 3ch 1080p SQ/RTSP/RTMP/TS network stream decoding input from IP camera, encoder etc. If it's required to decode 1ch 4K or 3ch 1080p, HDMI input should be disabled to make it valid.
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USB Input
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Not Supported, Built-in USB2.0 for Local Recording ONLY
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Image Fusion
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Supported, 1ch/2ch/3ch image fusion preview and output
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Video Output
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1ch/2ch/3ch image fusion output by HDMI loopout or network stream
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HDMI Output
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Max. 1920*1080P@30fps
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Audio Input
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Embedded over HDMI or 3.5mm Line-In
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Audio output
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Embedded over HDMI or 3.5mm Line-Out
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Audio Mix
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Supported, Available for Latest Firmware ONLY, Combining Audio from HDMI and Line-In to Output, But Decrease Volume for Active Audio
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Local Recording
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Built-in USB2.0 for Local Recording, Max. 128GB
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Interfaces
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1x HDMI In, 1x HDMI Out, 1x 3.5mm Line-In, 1x 3.5mm Line-Out, 1x USB2.0, 1x Hardware Reset Button, 1x RJ45
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Screen
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Not Supported
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Built-in OLED, Displaying IP Address, Video/Audio Source
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SS50 CODEC SERIES
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Part Number
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Part Name
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1080P Basic HDMI Encoder|Decoder w/HDMI Loopout, Dual USB2.0 for Webcam/Recoding/Playing
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1080P WiFi HDMI Encoder|Decoder w/HDMI Loopout, Dual USB2.0 for Webcam/Recoding/Playing
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1080P PoE HDMI Encoder|Decoder w/HDMI Loopout, Dual USB2.0 for Webcam/Recoding/Playing
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1080P Basic HDMI Encoder|Decoder w/Screen, HDMI Loopout, Dual USB2.0 for Webcam/Recoding/Playing
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1080P WiFi HDMI Encoder|Decoder w/Screen, HDMI Loopout, Dual USB2.0 for Webcam/Recoding/Playing
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Encoding|Decoding
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Max. 4ch encoding & decoding, including 1ch HDMI input, up to 3ch decoding input, up to 2ch USB input
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HDMI Input
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Max. 1920*1080P@60FPS, Encoding Up to 30FPS ONLY
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Decoding Input
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Max. 1ch 4K or 3ch 1080p SQ/RTSP/RTMP/TS network stream decoding input from IP camera, encoder etc.
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USB Input
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Max. 2ch USB2.0 webcam input, compatible with Hikvision, Logitech's webcam
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Image Fusion
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Supported, 1ch/2ch/3ch/4ch image fusion preview and output
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Video Output
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1ch/2ch/3ch/4ch image fusion output by HDMI loopout or network stream
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HDMI Output
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Max. 1920*1080P@60fps
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Audio I/O
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Embedded over HDMI or 3.5mm Line-In/Out
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Audio Mix
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Supported, Available for Latest Firmware ONLY, Combining Audio from HDMI and Line-In to Output, But Decrease Volume for Active Audio
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USB Port
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2ch USB2.0, available for 1080p Webcam/recording/playing
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Local Recording
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Built-In USB2.0 for Either Webcam or Local Recording, Max. 128GB
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Interfaces
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1x HDMI In, 1x HDMI Out, 1x 3.5mm Line-In/Out, 2x USB2.0, 1x Hardware Reset Button, 1x RJ45
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Screen
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Not Supported
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Built-in OLED, Displaying IP Address, Video/Audio Source
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🧙TIPS: it's strongly recommended to decrease volume if you're using Active Audio, or else the sound may explode.
Related Articles
FAQs: Audio
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