Hi there! I understand you're having trouble with audio not playing on the Substack app. I'd like to help you get this sorted out. Just to clarify, are you trying to listen to audio posts or podcasts within the Substack app on your Windows device? Also, is this issue happening with all audio content or just specific posts?

Meanwhile, here are some steps to try that commonly resolve audio playback issues on Substack:

1. Check Volume and Audio Output: Make sure your device’s volume is up and that audio is not muted. Also, ensure the correct audio output device (speakers, headphones) is selected.

2. Close and Reopen the App: Sometimes the app’s audio player can get stuck. Fully close the Substack app and then reopen it.

3. Clear App Cache (If Applicable): On mobile, cached data can interfere with audio playing. On Windows, try clearing your browser cache if you use the web app instead of the desktop app.

4. Update the App or Browser: Ensure you have the latest version of the Substack app or your web browser. Updates often fix bugs affecting audio.

5. Check Internet Connection: A poor connection might cause audio loading to fail. Try reconnecting or switching networks.

6. Try a Different Browser (If Using Web): Sometimes audio playback issues are browser-specific.

If none of these work, please tell me more about your setup—are you using the Substack desktop app, the web version on a browser, or a mobile app? Have you tried playing audio on other sites/apps to confirm your audio system is working correctly?

Once I have a bit more detail, I can guide you through more targeted troubleshooting!