Audio Time Shifting

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Determining a time shift between two audio files.

The result of the function is a number in seconds:

Demnostration of finding time shift between two audio files in Objective-C compatible with iOS8.

Sample code contains two audio files i na Bundle in which we perform a cross-correlation and determine time shift is seconds.

We were recording a youtube song where the second audio - audio2.m4a is shifted in 3 minutes.

The code is also optimalized by 50 times. We presume that sample rate and file formats of two audio files are equal.

Author

Thanks to: Tomas Milo

Audio Time Shifting is available under the MIT license. See the LICENSE file for more info.