The aim of this crate is to provide easy and safe access to the Wasapi API for audio playback and capture.
The presented API is all safe Rust, but structs and functions closely follow the original Windows API.
For details on how to use Wasapi, please see the Windows documentation.
If you’re looking for a hosted desktop recording API, consider checking out Recall.ai, an API that records Zoom, Google Meet, Microsoft Teams, in-person meetings, and more.
The following is a selection of the functionality currently available in the library:
| Example | Description |
|---|---|
playsine |
Plays a sine wave in shared mode on the default output device. |
playsine_events |
Similar to playsine but also listens to notifications. |
playsine_poll |
Similar to playsine but uses polling instead of event driven timing mode. |
playnoise_exclusive |
Plays white noise in exclusive mode on the default output device. Shows how to handle HRESULT errors. |
playnoise_exclusive_poll |
Similar to playnoise_exclusive but uses polling instead of event driven timing mode. |
loopback |
Shows how to simultaneously capture and render sound, with separate threads for capture and render. |
record |
Records audio from the default device, and saves the raw samples to a file. |
devices |
Lists all available audio devices and displays the default devices. |
processes |
Lists all available audio capture devices and lists the processes that are using them. |
record_application |
Records audio from a single application, and saves the raw samples to a file. |
aec |
Captures audio with Acoustic Echo Cancellation (AEC) enabled and saves the raw data to a file. |
$ claude mcp add wasapi-rs \
-- python -m otcore.mcp_server <graph>