in src/components/Player.js [102:116]
updateCounters() {
var currentTime = this.wavesurfer.getCurrentTime(),
totalTime = this.wavesurfer.getDuration()
var cd = moment.duration(currentTime, 'seconds')
var _cd = moment.utc(cd.asMilliseconds()).format('m:ss');
var td = moment.duration(totalTime, 'seconds')
var _td = moment.utc(td.asMilliseconds()).format('m:ss');
if (_td !== this.state.audioDuration) {this.setState({audioDuration: _td})}
if (_cd !== this.state.audioCurrent) {this.setState({audioCurrent: _cd})}
this.setState({isLoading: false})
}