Hi there! I understand that your Atmosphere app’s sleep sounds, especially the combination with binaural beats and the Neptune sound, are turning off before the timer you set elapses. Let’s get to the bottom of this so you can enjoy uninterrupted sound.

A couple of questions first to better understand what’s going on:
- Are you using the sleep timer option in the app to schedule the sound to turn off?
- Does the sound always stop early by roughly the same amount of time, or is it random?
- Have you tried this with other sounds or just the Neptune + binaural beats mix?
- Is your device going into any kind of sleep mode or power-saving mode while the app is running?

Meanwhile, here are some steps to try that often resolve timer-related issues on Windows devices with apps:

1. Check Sleep Timer Settings in the App
- Ensure the timer is correctly set and activated inside Atmosphere. Sometimes it’s easy to set it but not actually start it.

2. Keep App Active in Background
- On Windows 10, app background activity can be restricted, which may cause sounds to stop early.
- Go to Settings > Privacy > Background apps, then locate Atmosphere and make sure it’s allowed to run in the background.

3. Disable Power Saving or Sleep for the Device
- If your PC sleeps or the hard drive powers down before the timer expires, audio playback might stop early.
- Settings > System > Power & sleep > Set “Sleep” to “Never” or a longer duration while using the app.

4. Update the App and Windows
- Make sure you have the latest version of Atmosphere installed.
- Also, check for any available Windows updates, as those can fix timing or audio handling bugs.

5. Try a Different Sound Mix or Single Sound
- Sometimes combining binaural beats with other sounds could create conflicts with the timer.
- Test if the Neptune sound alone or binaural beats alone run the full timer duration without early cut-off.

6. Reinstall the App as a Last Resort
- If none of the above helps, uninstall Atmosphere and reinstall it fresh from the official source.

If you’ve already tried some of these steps, let me know which ones so we can dive deeper into possible advanced fixes. Also, share any error messages or unusual behavior you notice when the sound stops early.

Are you satisfied with these suggestions so far?