Github user whitecolor commented on the pull request:
https://github.com/apache/cordova-plugin-media/pull/40#issuecomment-68854223
@purplecabbage Well I think the variant with playbackRate option for
```play``` maybe ok but lets consider this most of the platforms treats
playback rate just like ```volume``` property, that can be changed at any time:
1) HTML5 audio supports just a property ```playbackRate``` on ```audio```
element, that you can set anytime while playing.
2) iOs supports ```setRate``` method on ```AVAudioPlayer``` object (to can
be set while
playing).(https://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVAudioPlayerClassReference/index.html)
3) Windows Phone supports ```SpeedRatio``` property on ```MediaElement```
(http://msdn.microsoft.com/en-us/library/system.windows.controls.mediaelement.speedratio(v=vs.110).aspx)
4) The problem with android: phonegap uses ```MediaPlayer``` for playing
media files, but it does not support any rate change methods (an old issue
https://code.google.com/p/android/issues/detail?id=1961), there is also
```AudioTrack``` class, that can be used to play media, and probably have some
capabilities of chanding rate (need to be tested) but there is a problem with
seeking and actually it plays only uncompressed audio (that can be taken from
```MediaPlayer``` - so the workflow with using ```AudioTrack``` is quite
complicated). The is also ```SoundPool``` class that has method ```setRate```,
but it has the same problems that ```AudioTrack``` class. But actually people
do implement such capabilities in android (in different audiobooks playing
applicatons).
So I think it is reasonable to approach to ```payback rate``` just as to
```volume``` property, and as PG has method ```setVolume``` and had proposed
```setRate``` for this. What do you think?
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