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For a stereo YouTube Live stream sent over RTMP or RTMPS, use AAC audio at 44.1 kHz and 128 kbps. These are YouTube’s recommended live settings for stereo. If you are uploading a finished loop instead, use the separate upload guidance: 48 kHz, with AAC-LC, Opus, or Eclipsa Audio; YouTube recommends 384 kbps for stereo uploads.
Recommended settings for a live ambient stream
For conventional stereo delivery to YouTube Live over RTMP or RTMPS, set your encoder to:
- Audio codec: AAC
- Sample rate: 44.1 kHz
- Audio bitrate: 128 kbps for stereo
- Channel layout: Stereo
YouTube lists AAC and MP3 as supported RTMP/RTMPS audio codecs, and recommends 44.1 kHz and 128 kbps for stereo. AAC is the conservative choice: YouTube identifies it as the supported option for 5.1 audio, while a stereo sleep stream has no stated need for surround sound. These are platform compatibility recommendations, not the results of a listening test showing that AAC always sounds better than MP3. YouTube’s live encoder settings provide the current guidance.
Choose settings for the route you are using
Live RTMP/RTMPS, live HLS, and an uploaded replay are different delivery routes. Apply the settings for the route that actually sends audio to YouTube.
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| Delivery route | YouTube audio guidance | Practical choice |
|---|---|---|
| Live via RTMP/RTMPS | AAC or MP3; recommended stereo settings are 44.1 kHz and 128 kbps. AAC is required for 5.1. | Stereo AAC, 44.1 kHz, 128 kbps. |
| Live via HLS | AAC is supported; audio must be single-track. | Use AAC and check that the encoder and HLS packaging follow the YouTube HLS ingestion guide. |
| Uploaded video or pre-rendered replay | YouTube lists AAC-LC, Opus, or Eclipsa Audio, specifies 48 kHz, and recommends 384 kbps for stereo uploads. | Use upload settings for the finished file; do not carry over the live bitrate automatically. |
The live values come from YouTube’s live encoder recommendations; the upload values come from YouTube’s upload encoding recommendations. YouTube Help says it automatically transcodes live streams into output formats for viewers on different devices and networks. That does not remove the need to send a supported, correctly configured input stream.
Set up and test the audio before going live
- Identify the ingest route. Confirm whether your encoder sends RTMP/RTMPS, whether your workflow uses HLS, or whether you are uploading a completed file. Match the audio settings to that route.
- Configure a stereo live feed. For RTMP/RTMPS, select AAC, 44.1 kHz, and 128 kbps. If using HLS, use AAC and verify the single-track requirement against the HLS guide.
- Test with the actual ambient bed. Before the long stream, send a test using audio and video similar to the planned broadcast. Listen for silence, clipping, abrupt changes, or a loop seam that becomes distracting over repeated playback.
- Check YouTube stream health. Review the live control room’s warnings during the test and monitor health during the event. The Live Streaming API guidance identifies audio codec, bitrate, and sample-rate issues as possible configuration problems; see LiveStreams API documentation and configuration issue guidance.
Production choices for sleep audio
YouTube’s published encoding guidance does not specify a sleep-specific loudness target, compression setting, or dynamics preset. Treat level and dynamics as production decisions rather than platform requirements. Aim for a comfortable, consistent perceived level and avoid sudden jumps between sections or at the loop point; then verify by listening to the encoded test stream, not just the source file.
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A file format cannot ensure uninterrupted playback by itself. A 24/7 setup also depends on continuous source playback and a functioning encoder or streaming service. YouTube’s cited encoding guidance does not prescribe a failover configuration or guarantee uptime.
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