TapNoiseFirst find out whether all Mac audio is silent or only one app. That distinction avoids changing permissions and reinstalling software when the sound is simply routed elsewhere.
Start with one known source
Play a short clip you know contains audio. Check its own volume and mute control, then choose the built-in speakers in Sound › Output and raise the device volume modestly.
If that works, the Mac can play audio. Return to the silent app and inspect its settings. A muted browser tab or an app-level slider can explain isolated silence.
Remove routing uncertainty
Disconnect unused headphones, interfaces or displays if appropriate, or explicitly select the intended output. Reconnect one device at a time if the problem appears only with a dock or monitor attached.
Avoid beginning with service-killing Terminal commands. They can interrupt other audio work and provide less useful evidence than a controlled output test.
For TapNoise specifically
Check the Sounds switch, app volume, license or trial state and Input Monitoring. If the microphone is active, Quiet during calls may be pausing playback intentionally. The menu gives a more specific status than a general “no sound” symptom.
Use TapNoise’s diagnostic guide for those checks. If the internal speakers remain silent across known audio sources after Apple’s steps, arrange support or service rather than treating another typing theme as a hardware fix.
Sources: Apple’s internal-speaker troubleshooting, TapNoise no-sound guide.