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    No sound at all

    1. Check your phone is not muted and the media volume is up. Ringer volume and media volume are separate.
    2. Check the output routing on the player screen and select the headphones.
    3. If a sound will not stream, check your connection. Frequencies work offline, sounds do not unless downloaded.
    4. Force close the app and reopen it.
    5. Confirm the app has permission to play audio and is not being throttled by battery saver mode.
    6. If only one ear plays on a Solfeggio tone, that is the sync button rather than a fault. Tap the middle button to sync both ears.

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