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The host creates the session, chooses the vocal source, controls the shared backing timeline, and adds the combined output to OBS.

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Before you start

  • Install vAudioLink Karaoke on both computers.
  • Add your microphone as an OBS audio source.
  • Prepare a supported YouTube link or local .opus or .ogg backing file.
  • Use headphones on both computers.
1

Open Music Collab

Open the Music Collab or vAudioLink Karaoke dock from the OBS Docks menu.On What are you doing today?, select Host a session.
2

Authorize the dock

Complete the browser sign-in. Return to OBS when the browser reports success.Expected result: the dock displays Start a new session and your account status permits hosted relay access.
3

Configure the session

  1. Set Room mode to Direct OBS Room.
  2. Select the closest healthy Relay region.
  3. Under Your vocal source, select your microphone.
  4. Select Refresh if the source was added after the dock opened.
  5. Select Create session.
Expected result: the live page is titled Streamer Music Collab and shows a guest key.
4

Invite the guest

Select Copy beside the guest key and send it privately. Ask your partner to follow Join a Music Collab session.Wait until the peer card changes from Waiting for your partner… to a connected state.
5

Load a backing track

Choose one input:
  • Paste a YouTube URL and select Load / Change track.
  • Select Local file, choose an .opus or .ogg file, then select Load / Change track.
Keep the room connected while preparation and transfer run in the background.
6

Wait until both ends are ready

Do not start the song while the dock says it is preparing, hashing, uploading, receiving, or waiting for the partner.Expected result: the sync status reports that the backing track is ready on both peers.
7

Add the managed OBS sources

With the target scene active, select + Add Output + Backing + Video to scene.The plugin creates a managed group containing the combined output, the local backing monitor, and muted backing video. Use + Add combined output if you only need the program mix.
8

Check routing

Confirm vAudioLink Output is in the program mix. Do not route vAudioLink Backing (monitor) into the program as a second copy.Use Audio routing before continuing.
9

Run a synchronized start

Select Start song and allow the scheduled lead-in to complete. Both participants should hear the same backing timeline.Record a short duet, then listen for doubled backing audio, delayed self-monitoring, or vocal misalignment.

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During the performance

  • Start song starts the prepared track on the shared schedule.
  • Restart schedules the track from the beginning again.
  • The square stop control stops the backing track on both peers.
  • Karaoke View ↗ opens the performance view.
  • Rotate key invalidates the previous guest credential and creates another.
  • Remove from OBS removes plugin-owned managed sources, not unrelated user sources.
Do not select Start song until both peers report the backing ready. Starting during transfer is expected to fail or wait.

Music troubleshooting

Fix preparation, transfer, duplicate backing, source ownership, and synchronization problems.