IQAudioRecorderController from Mohd Iftekhar Qurashi providing an open source iOS user interface component for recording audio, playing back recordings and cropping audio.
IQAudioRecorderController supports .m4a audio, and supports easy color theming. The interface supports easy audio selection similar to iMovie style movie cropping and wave form audio visualization. You can control the length of the recording, and whether the user is allowed to crop audio.
This image from the readme shows IQAudioRecorderController in action:
You can find IQAudioRecorderController on Github here.
A nice drop-in audio recorder UI component.
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