Volume props is not working

I am trying to control the volume of react-sound but, it looks alike volume props is not being accepted by component. here is the same code which I wrote and your NPM props.

My code:

this.state = {
  volume: 10
}

<Sound
           url={this.prepareUrl(this.state.track.stream_url)}
           playStatus={this.state.playStatus}
           onPlaying={this.handleSongPlaying.bind(this)}
           playFromPosition={this.state.playFromPosition}
           volume={this.state.volume}
           onPause={() => console.log('Paused')}
           onResume={() => console.log('Resumed')}
           onStop={() => console.log('Stopped')}
           onFinishedPlaying={this.handleSongFinished.bind(this)}/>

 <Player         
  onVolumeUp={() => this.setState({volume: volume >= 100 ? volume : volume+10})}
  onVolumeDown={() => this.setState({volume: volume <= 0 ? volume : volume-10})}
 />

Evan these log is not working.

Some props from your NPM :

{
    key: 'propTypes',
    value: {
      url: _react.PropTypes.string.isRequired,
      playStatus: _react.PropTypes.oneOf(Object.keys(playStatuses)).isRequired,
      position: _react.PropTypes.number,
      playFromPosition: _react.PropTypes.number,
      onLoading: _react.PropTypes.func,
      onPlaying: _react.PropTypes.func,
      onFinishedPlaying: _react.PropTypes.func
    },
    enumerable: true
  }, {
    key: 'defaultProps',
    value: {
      playFromPosition: 0,
      onLoading: noop,
      onPlaying: noop,
      onFinishedPlaying: noop
    },
    enumerable: true
  }

can you please help me to understand this why I am not able to control the sound. am I missing something or something else?

Start at the Sound and Player entry points shown in the issue, then compare the documented props with the component's propTypes and defaultProps. Reproduce the volume update using the supplied example and check whether the callbacks change the state passed to Sound. Done means the documented volume control changes playback as expected, with the relevant behavior covered by an existing or added test.