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Audio Monitoring

OBS Audio Monitoring Settings for a Nonstop YouTube Playlist Stream

Use OBS Monitoring Enabled to hear playlist audio while keeping it in stream output. Choose the right device, prevent duplicate capture, and test the mix.

By VGSources Team 3 min read
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To hear a playlist locally while its audio still goes to your YouTube stream, set that source to Monitoring Enabled (called “Monitor and Output” in some OBS versions), then choose the playback device under OBS’s monitoring-device setting. Do not choose “Monitor Only (mute output)” if viewers must keep hearing the source. Monitoring lets you hear the audio; it does not make a playlist loop or keep a stream live on its own.

Set a playlist source to play locally and stay in the stream

  1. In OBS, find the playlist’s audio source in the audio mixer and open Advanced Audio Properties.
  2. For that source, select Monitoring Enabled, or the equivalent “Monitor and Output” option in your installed version. This sends the source to your monitoring device while leaving it in the stream output.
  3. Open OBS audio settings and select the monitoring device you want to hear through. OBS’s Audio Mixer Guide describes the monitor control as playing the source through the device configured in Settings.
  4. Play the playlist and confirm that the source meter moves. Listen to the monitored signal before relying on it as your cue for a transition.

Wired headphones are an optional way to listen through the selected device; new headphones are not required if your existing playback device works.

Choose the right monitoring mode

OBS mode What you hear What viewers hear
Monitor Off No local monitoring is requested. The source remains in stream output.
Monitor Only (mute output) The source plays through the monitoring device. The source is muted from output; do not use this if it must remain in the stream.
Monitoring Enabled / Monitor and Output The source plays through the monitoring device. The source remains in output.

OBS’s English interface labels can vary by version. Check the wording in your installed build, especially if the mode names differ.

Prevent echo and check the audio before going live

If the selected monitoring device is also captured by OBS as desktop or application audio, the same signal can enter the mix twice. That may sound like an echo or a hollow duplicate. If this happens, use a separate playback device or a carefully configured virtual audio route so the monitored signal is not captured again.

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  • Watch the source meter during playback; OBS says its red zone is near clipping.
  • Listen to the source early, then listen again through OBS rather than relying only on YouTube playback, which may be delayed.
  • Make a recording of a normal session and listen back before going live.
  • For stereo sources, check both left and right meters. OBS defaults to stereo, and its application settings can change the channel configuration.

What local monitoring does—and does not—solve

Monitoring is useful when you need to hear a playlist locally, including to judge when a video is nearing its end. It controls where that source’s audio is played; it does not configure playlist looping, automate source changes, handle reconnection, or guarantee uninterrupted 24/7 operation.

YouTube’s HLS setup guidance concerns HLS ingestion rather than OBS local monitoring or playlist looping. Its segment and audio configuration values apply to HLS, not as general recommendations for an OBS RTMP playlist stream. HLS also has higher latency than RTMP because it sends video in segments. See YouTube’s HLS setup guidance for that protocol’s requirements.

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