[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [WebAudio](./puppeteer.protocol.webaudio.md) > [NodeParamConnectedEvent](./puppeteer.protocol.webaudio.nodeparamconnectedevent.md) > [sourceOutputIndex](./puppeteer.protocol.webaudio.nodeparamconnectedevent.sourceoutputindex.md) ## Protocol.WebAudio.NodeParamConnectedEvent.sourceOutputIndex property Signature: ```typescript sourceOutputIndex?: number; ```