[leetrout]

OP should put it up front in their README.

But from the code, seems it does.

  static let supportedExtensions = ["mp3", "m4a", "wav", "aac", "aiff", "flac"]

[kushalpandya]

Thanks for the feedback, I'll add it to Readme, although app lists supported formats (as supported by AVFoundation) on app UI where user can add folders.