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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →If your AWS Elemental MediaLive stream reaches YouTube but has no sound, trace the audio path from the source through MediaLive to YouTube before changing settings. The fault may be missing at the source, an incorrect input audio selector, an output without a mapped audio encode, or an ingest or playback issue. Work through the checks below in order.
1. Confirm the source actually has audio
Listen to or monitor the signal before it enters MediaLive. If the source is silent, downstream settings cannot restore its audio.
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If the source is AWS Elemental Link, check that the signal is locked and inspect the EncoderRunning metric. AWS says a value of 0 means the encoder is not processing the input; verify that a valid signal is being sent to the device. AWS Elemental Link monitoring guidance describes the metric.
2. Verify MediaLive is extracting the intended audio
In the MediaLive channel configuration, inspect the input attachment and its audio selectors. A selector identifies the audio asset MediaLive extracts; confirm that it points to the track, PID, or language actually present in that input. The selector requirements vary by input type: for example, HLS and other multitrack inputs may require identifying a PID or language, while RTMP is described as carrying a single audio asset. See the MediaLive input documentation.
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If audio fails only when the channel switches to certain inputs, compare each attachment’s available tracks and selector configuration. For a multiple-input channel, AWS says to extract the same audio languages from each input and use identical selector names across inputs.
3. Check the output audio encode and mapping
Inspect the output used for YouTube. It needs an audio encode, and that encode must reference the intended input audio selector. A video encode alone can produce a picture without sound.
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For AWS’s documented MediaLive-to-YouTube HLS example, the output group is HLS; in Stream settings, select Audio 1 and choose AAC. That example was published on 14 April 2021, so use it as a configuration example and verify the current console labels and available options for your channel. Do not apply its HLS settings automatically to an RTMP workflow. AWS Media Blog: streaming to YouTube with MediaLive.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute4. Match the output group and destination to YouTube ingest
Check that the MediaLive output group and protocol match the ingest workflow configured in YouTube Live Control Room. Confirm that the destination uses the intended YouTube stream URL and stream key. YouTube’s encoder setup guidance explains how to configure an encoder with the platform’s URL and key: Set up your encoder for live streaming.
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5. Use YouTube’s live preview to locate the break
Compare the source audio with the Live Control Room preview. If the preview is silent, continue upstream through the MediaLive output, selector, and input. If the preview has sound but a viewer’s playback is silent, check that device’s mute, volume, and playback path before changing the MediaLive channel. This comparison helps narrow the fault; it does not by itself identify a specific cause.
6. Confirm the audio format fits the protocol
Audio compatibility depends on the ingest protocol and intended channel layout. For the AWS-documented HLS configuration, YouTube HLS audio is AAC in an MPEG-2 transport stream. YouTube’s 5.1 guidance is a separate case: it lists AAC for RTMP and AAC, AC-3, or E-AC-3 for HLS, at 48 kHz and 384 Kbps. Those 5.1 values are not general stereo requirements. YouTube supports mono, stereo, and 5.1 configurations; consult its 5.1 surround sound live-streaming guidance when producing surround audio.
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Quick fault-isolation guide
| Where to check | What to inspect | What the result suggests |
|---|---|---|
| Source | Is audio audible before MediaLive? For Elemental Link, is signal lock present and is EncoderRunning nonzero? |
If the source signal is absent, changing YouTube settings will not repair it. AWS documents zero as the encoder not processing the input. |
| MediaLive input | Does the selector identify the actual track, PID, or language for this input? | Selector requirements vary with input type; a wrong or unavailable selection can leave the output without the intended audio. |
| MediaLive output | Is an audio encode present, mapped to the correct selector, and configured for the ingest protocol? | The AWS HLS example uses Audio 1 and AAC; RTMP should not be configured by blindly copying that HLS example. |
| YouTube ingest and playback | Does Live Control Room receive the intended stream and show audio? Is the configured ingest protocol the one MediaLive sends? | If preview audio is present but playback is silent, investigate the player or device path rather than assuming the channel encode is at fault. |
Common causes and fixes
- No audio at the source: restore the signal or source audio first; for Elemental Link, verify signal lock and
EncoderRunning. - Wrong input audio selector: select an audio asset that exists on the attached input and matches the required track, PID, or language.
- Audio encode missing or mapped incorrectly: add or correct the output audio encode and point it to the intended selector.
- Protocol mismatch: align the MediaLive output group with the YouTube ingest workflow; do not treat HLS and RTMP settings as interchangeable.
- Silence only in a playback device: use the Live Control Room preview to distinguish a stream-side problem from a muted or misrouted playback path.
Or let it run in the cloud
This troubleshooting flow is for a MediaLive workflow. If your goal instead is to keep uploaded videos playing as a 24/7 YouTube stream, StreamNeo is a separate cloud service: upload a video or playlist, add your YouTube stream key, and go live. Nothing has to stay on at home; it streams your upload as made, up to 4K 60fps, at one price per slot, and automatically recovers if YouTube drops the stream. The first day is free with no card. Monthly pricing is $9.99 per month. Start your free StreamNeo day.
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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
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
