Concurrency & polyphony & low latency

[ghost]

Hello guys,

Would you guys please make this plugin support multiple file playback at a time with low latency? That would help a lot in my project..

and I would like to request:

• Preload (preload media files before playing... like on initialization of app)
• Unload (unload media files from RAM memory when they become unnecessary. It's not good to keep hold them on your RAM!)
• Display waveform of media file. All audio files have waveform data inside.. please give us an option to display waveform data!
• Pan audio file (please give us an option to pan audio file either left to right in percentage value.)

Thanks, keep up the good works!

[bradmartin]

Hi @jamesharvey2 that's a lot of additions so I don't think I'll have time to work on that anytime soon. We'd definitely welcome a PR with all of that functionality. Some of your points might already have possible functionality:

• Preload: Have you tried initializing the mediaplayer with one of the initFrom... methods to see if that helps?
• Pan audio file: this isn't a UI component but I believe adding a slider to your app and using its change event to then change the current playing time of the audio player should work.
• Waveform: I don't have much working knowledge of using/working with waveforms. I do know on the TNSRecorder we have the meters possibility so maybe that's a good place to start looking if you want to contribute that piece.

At any rate, thanks for looking at the plugin and hope you can contribute 😄 👍

[bradmartin]

I just read over you message again, the part of playing multiple sound files at once, this isn't possible with one instance of the Android MediaPlayer, it only supports one file (datasource) at a time. You'd have to create multiple instances of the player and set the sources individually, which should be possible in the plugins current state. Please try and let me know if you need any help.

[ghost]

@bradmartin Thanks for your reply.

Yes, I will try solutions you have suggested!

Here's an example of waveform generated from a track: https://transloadit.com/demos/audio-encoding/generate-a-waveform-image-from-an-audio-file/ It's not that complicated to do in other javascript audio frameworks. Honestly, I don't know how to implement this feature into your plugin.. I will look into it though.

Is it possible for you to make this plugin provide gapless loop playback? for instance, when you loop an audio track, there's 0.7 second gap (silence) between each loop. I would really appreciate it if you make this happen. Then I can use short audio files and loop it rather than using a long audio track containing loops.

https://en.wikipedia.org/wiki/Gapless_playback

Thanks again, and happy holidays.

[bradmartin]

The plugin could potentially support doing what you want with a waveform, Android does have this class https://developer.android.com/reference/android/media/audiofx/Visualizer.html to visualize audio playing which seems what you are wanting. As for doing the changes, I don't really have a need for this right now so I can't say if/when it will ever happen. If you'd like you can check on the NS forums or slack channel for help if you want to work on it. You can also ping team@nstudio.io if you'd like to pay someone to work on it. Thanks again. Keep me posted if you have any questions on what you attempt.

[ghost]

Okay, I will try to make it work by myself. Yes, Android does come with lots of useful audio APIs and NativeScript can use them all. I just learned that.

Thanks again for creating this plugin & appreciated!

[suparnavg]

@jamesharvey2 did you figure out how to get the waveform working? This is a pretty cool feature (and necessary imo) and I'm trying to get it to work myself. @bradmartin it would be a fantastic addition to this plugin!