> 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. # autoGain$ > Observable indicating whether auto-gain control is enabled. ```ts get autoGain$(): Observable ``` Observable indicating whether auto-gain control is enabled. ## autoGain ```ts get autoGain(): boolean ``` Whether automatic gain control is enabled. ## **Examples** ```ts participant.autoGain$.subscribe((autoGain) => { console.log('autoGain:', autoGain); }); ``` > Observable indicating whether auto-gain control is enabled.