What does audio endpoint mean?
An audio endpoint is an operating-system-visible playback or recording destination. Speakers, a headset microphone, and an HDMI monitor can appear as distinct endpoints. A single physical accessory may expose both an output and an input, while a computer with several sound paths may offer several outputs.
The selected endpoint determines where an application sends playback or obtains input. The underlying audio driver is important, but choosing the wrong endpoint can produce silence even when that driver is installed and the hardware functions. Application-level audio choices can differ from the system default. Permissions can separately affect microphone recording.
Example in context
A laptop plays a meeting through its attached display instead of its built-in speakers. The HDMI audio endpoint was selected when the display was connected. Switching to laptop speakers addresses the routing question; reinstalling the built-in codec package would not be the first test. If the display endpoint is absent entirely, examine its connection and graphics/audio support.
A common misunderstanding
The volume slider moving does not prove that the intended speaker received sound, and a no-warning Device Manager entry does not prove that the correct endpoint is selected. Similarly, a microphone that is listed but unavailable to one app might need permission or an app input change rather than a new driver.
How to use this term
A Bluetooth headset can present different playback and microphone behavior depending on its supported profiles and current use. The application may pick one input while the system default points elsewhere. Before reinstalling a driver, record the selected endpoint, whether its level meter responds, and what changes when the headset is disconnected. These observations distinguish device availability from audio routing and app permissions without assuming every silence has the same cause.
Compare [device driver](/glossary/device-driver) and [device status](/glossary/device-status). Use [output and volume](/types/audio/no-sound-troubleshooting/check-output-and-volume) to test playback, [HDMI audio](/types/audio/no-sound-troubleshooting/hdmi-and-display-audio) for monitor routing, or [microphone and recording](/types/audio/audio-devices-compatibility/microphone-and-recording) for input.