Foobar2000

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foobar2000 (often abbreviated as fb2k) is a freeware audio player for Microsoft Windows, iOS and Android developed by Peter Pawłowski. It is known for its highly modular design, breadth of features, and substantial user flexibility in configuration. For example, the user-interface is completely customizable, the standard “skin” elements can be individually augmented or entirely replaced with different dials and buttons, as well as visualizers such as waveform, oscilloscope, spectrum, spectrogram (waterfall), peak and smoothed VU meters. Its extensive software development kit (SDK) allows third-party developers enough power to completely replace the interface.
foobar2000 supports many audio file formats, has many features for organizing metadata, files, and folders, and has a converter interface for use with command line encoders. To maximize audio fidelity in cases where resampling or downscaling in bit depth is required, it provides noise shaping and dithering. There are a number of official and third-party components which add many additional features. The core is closed source, whereas the SDK is licensed under the Three-Clause BSD license.