> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes. # preferredAudioInput > Preferred audio input device for new calls. ```ts get preferredAudioInput(): MediaDeviceInfo | null set preferredAudioInput(value): void ``` Preferred audio input device for new calls. ## **Parameters** **`value`** `MediaDeviceInfo | null` Preferred audio input device, or `null` to clear. See [`MediaDeviceInfo`](https://developer.mozilla.org/en-US/docs/Web/API/MediaDeviceInfo). --- ## **Examples** ```ts console.log(client.preferences.preferredAudioInput); ``` > Preferred audio input device for new calls.