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Audio & Headphones
4 min read

When Only One Earbud Plays

Charging contacts, pairing state and balance settings cause most one-sided audio.

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At a glance

  • →One-sided audio is usually charging or pairing, not failure.
  • →The balance slider affects every set of headphones.
  • →A full reset re-establishes the pair relationship.

Wireless earbuds work as a pair with one bud acting as the primary link. If the secondary fails to join, audio plays through one side while the pair otherwise behaves normally.

The usual cause is charging. Dirty contacts in the case mean one bud never charged, so it never woke up to join the pair.

Balance settings are the overlooked software cause. An accessibility balance slider dragged to one side produces perfect one-sided audio through any headphones, including wired ones.

Testing with a different source device and a different pair separates the three possibilities in a couple of minutes.

Common causes

  • Dirty or misaligned charging contacts in the case
  • One bud failing to rejoin the pair after a disconnect
  • Audio balance shifted in accessibility settings
  • Debris blocking one earbud's sound port
  • A firmware update applied to only one bud

Troubleshooting tips

  1. 1Clean the case contacts and the bud pins with a dry cotton bud.
  2. 2Return both buds to the case, close it, then re-open to force a re-pair.
  3. 3Check the accessibility audio balance is centred.
  4. 4Reset the pair and re-pair from scratch.
  5. 5Test the same buds with another device before replacing them.

Key takeaways

  • • One-sided audio is usually charging or pairing, not failure.
  • • The balance slider affects every set of headphones.
  • • A full reset re-establishes the pair relationship.

Related guides

5 min readWhy Headphones Connect to the Wrong DeviceMultipoint lets earbuds hold two connections at once, and the priority rules confuse everyone. 4 min readWhy Audio Stops WorkingSilence is usually the wrong output device, not a broken speaker.

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