uniapp 怎么利用视频的倍速播放让音频倍速播放啊

<video class="testvideo" id="myVideo" @timeupdate="timeupdate" ref="video" ></video>
<view @tap="setRate(2.0)" id="select" class="speed">2.0倍</view>

return里>>>videoContext:''

created() {
			this.videoContext = uni.createVideoContext('myVideo',this)}
setRate(value) {
				this.videoContext.playbackRate(value);
				console.log('2倍速')
			},

这样么？ this.videoContext.src=this.innerAudioContext.src

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