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If a sound file plays on your computer but viewers hear nothing, check the whole audio path: the file and selected track, the streaming source, the encoder’s mixer, stream-output routing, and the platform’s ingest. A moving meter in OBS is useful, but it does not by itself prove that audio is reaching viewers. Work through the checks below in order, changing one thing at a time.
First, find where the sound disappears
There are several separate checkpoints between a media file and a viewer: the file must contain audible sound, the streaming application must decode the intended track, audio must reach the stream mix, the encoder must send it, and the destination must accept and deliver it. Local monitoring is another path: it lets you hear audio on your own device, but a monitoring problem does not necessarily mean the stream is silent.
- Play the file locally. Confirm that it contains audible sound. If it is a video with multiple audio tracks, select the track you intend to use.
- Check the streaming source. Make sure the application has loaded the right file and that playback has started.
- Check the mixer. Look for activity on the source’s meter and confirm it is not muted.
- Test the stream output. If the meter moves but viewers hear nothing, check output routing and the destination’s stream-health information.
- Compare playback devices. Test the result on another browser or device to see whether the issue is limited to a particular playback path.
This sequence helps distinguish a file or source problem from a mixer, output, delivery, or viewer-device problem.
Check the file and source type
Verify the media itself
Open the file in a local media player and listen to the part you are trying to stream. If it is silent there, the streaming application cannot restore sound that is not present in the selected content. For a video with more than one audio track, check that the intended language or mix is selected; the file can play normally while the wrong track is silent.
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Use a source that can read the format
In OBS Studio, a Media Source is the direct way to add a media file. OBS lists MP3, AAC, OGG, and WAV as supported audio types for Media Source. If you need extended media support or a playlist, OBS’s VLC Video source uses VLC libraries and requires VLC to be installed. OBS Project specifies that 64-bit OBS requires 64-bit VLC. If the source does not load, check the source type, file path, and required VLC installation before changing stream settings.
Check OBS playback, mixer, and monitoring
Watch the source meter during playback
Start the media and watch the corresponding source in the OBS Audio Mixer. OBS’s mixer displays volume meters and mute controls. If the meter does not move, confirm that the source is playing, the correct source is selected, and the source is not muted. A meter that moves indicates audio is reaching that mixer source; it does not establish that the stream output includes it.
Rank #2
- The new generation of the songwriter's interface: Plug in your mic and guitar and let Scarlett Solo 4th Gen bring big studio sound to wherever you make music
- Studio-quality sound: With a huge 120dB dynamic range, the newest generation of Scarlett uses the same converters as Focusrite’s flagship interfaces, found in the world's biggest studios
- Find your signature sound: Scarlett 4th Gen's improved Air mode lifts vocals and guitars to the front of the mix, adding musical presence and rich harmonic drive to your recordings
- All you need to record, mix and master your music: Includes industry-leading recording software and a full collection of record-making plugins
- Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools
Separate local monitoring from stream audio
If you cannot hear the sound yourself, check the source’s monitoring control and the configured monitoring device. Monitoring routes playback to your selected listening device; it is not the same diagnostic question as whether the encoder is sending the source to the stream. If the meter moves but your headphones or speakers are silent, test the selected device and local monitoring separately from the viewer test.
If OBS shows audio but the stream is silent
Check the encoder output and destination health
Use the streaming destination’s stream-health or encoder dashboard while running a short private or unlisted test where available. YouTube Help advises checking sound directly in the encoder and consulting stream-health errors. Its troubleshooting distinguishes an encoder or source-path fault from a healthy encoder with an outbound connection problem. That distinction matters: a meter moving in OBS can coexist with a problem later in the output or delivery path.
Rank #3
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- TWO JACKS, TWO JOBS - The green jack is stereo OUT for headphones or powered speakers; the pink jack is mono microphone IN for a 3.5mm mic. It does NOT support 4-pole headsets on a single combo plug, it does NOT power passive speakers, and it does NOT add surround sound - it is a stereo 2-channel adapter.
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- If the destination reports missing audio, revisit the encoder’s audio output and track routing.
- If the encoder indicates healthy output but delivery is failing, follow the destination’s connection or stream-health guidance rather than changing the media file without evidence.
- If the test stream works on one device but not another, investigate that device’s playback path before altering the source.
Use destination-specific audio settings
For YouTube Live’s documented RTMP/RTMPS settings, YouTube lists AAC or MP3 audio. Its settings guidance specifies 44.1 kHz for stereo, 48 kHz for 5.1, and 128 Kbps for stereo audio. These are YouTube-specific settings, not universal requirements for every streaming platform. Check the current destination dashboard and encoder guidance before applying them; platform requirements can change. YouTube’s error guidance also flags unsupported audio codecs, incorrect sample rates or bitrates, and streams with no audio or multiple audio streams.
If sound fails only on a phone or one playback setup
If the stream or recording sounds correct on a computer but sounds poor or disappears when played on a mobile device, investigate stereo-to-mono compatibility. YouTube Help documents that stereo audio with poor mono compatibility can lose quality or become muted when converted to mono on mobile, and advises checking phase. Compare the source and the streamed result on another browser or device. This is a relevant branch when the problem is device-specific, not a general explanation for every silent live stream.
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Common symptoms and fixes
| Symptom | Likely checkpoint | What to do |
|---|---|---|
| The file is silent when played locally | File content or selected audio track | Test another section or select the intended track in the player or source. |
| The file plays locally, but the OBS source meter does not move | Source loading, playback, format, or mute state | Confirm the correct file and source type, start playback, and check mute. For VLC Video, verify VLC is installed and its architecture matches OBS. |
| The OBS meter moves, but you cannot hear the source | Local monitoring path | Check the source’s monitoring control and selected monitoring device; then test stream output independently. |
| The meter moves, but viewers hear nothing | Stream routing, encoder output, or destination ingest | Run a short test, inspect output routing, and check the destination’s stream-health or encoder messages. |
| Audio works on a computer but not on mobile | Playback-device behavior or stereo/mono compatibility | Compare another device and investigate phase or mono compatibility where applicable. |
| The destination reports an audio error | Codec, sample rate, bitrate, missing audio, or multiple audio streams | Match the destination’s current encoder guidance and verify that the intended audio output is present. |
Or let it run in the cloud
If your goal is to keep uploaded recordings playing on a YouTube channel, StreamNeo is a cloud option rather than a fix for a faulty source file or audio mix. Upload the recording or build a playlist, add your YouTube stream key once, and go live. StreamNeo loops the uploaded video from the cloud, so your computer and home connection do not have to stay on.
- Nothing has to stay running at home.
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- Automatic recovery is included if YouTube drops the stream.
- The first day is free with no card required.
- Monthly: $9.99 per month.
StreamNeo is for uploaded videos on YouTube, not live camera input. Learn more at StreamNeo, or start the free first day.
Quick Recap
Best Value
- The new generation of the artist's interface: Connect your mic to Scarlett's 4th Gen mic pres. Plug in your guitar. Fire up the included software. Start making your first big hit
- Studio-quality sound: With a huge 120dB dynamic range, the newest generation of Scarlett uses the same converters as Focusrite’s flagship interfaces, found in the world's biggest studios
- Never lose a great take: Scarlett 4th Gen's Auto Gain sets the perfect level for your mic or guitar, and Clip Safe prevents clipping, so you can focus on the music
- Find your signature sound: Air mode lifts vocals and guitars to the front of the mix, adding musical presence and rich harmonic drive to your recordings
- With Scarlett 4th Gen, you have all you need to record, mix and master your music: Includes industry-leading recording software and a full collection of record-making plugins
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