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Asked: 2026-05-26T22:23:40+00:00

I am building an App that allows our customers to record, save, and play

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I am building an App that allows our customers to record, save, and play recorded sound as a basic functionality. This should be straight using AVFoundation Framework. What I also allow users are

  1. Fast Forward and Reverse functionality.
  2. User should also able to manipulate the sound. I mean they allow to insert the sound in between their recorded sound later.

Could anyone please tell me how could I achieve these? Is there any good open-source library for this?

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1 Answer

  1. Editorial Team

    The AVAudioPlayer supports manipulating the playback speed via the rate and enableRate properties, but it only allows forward playing.

    The MPMoviePlayerController conforms to the MPMediaPlayback protocol which allows you to specify any rate (even reverse). Though this method will result in choppy audio for some rates.

    As far as merging audio files, I think your best bet is to convert your samples to linear PCM. Then you can insert additional samples anywhere in your stream.

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