Sifft VST is an open-source WAV player that utilizes the Fast Fourier Transform (FFT) technique to offer independent control over pitch and time. By analyzing phase differences between audio blocks, it achieves precise pitch reproduction even under extreme time-stretching conditions, such as slowing down audio by over a thousand times. While minor adjustments may introduce a subtle noisy texture due to phase misalignment, the plugin excels at maintaining accurate pitch during extensive modifications, making it a powerful tool for creative audio manipulation.

This plugin supports a wide range of WAV formats, including 8, 16, and 24-bit files, and offers three interpolation methods to shape the playback waveform: floor, linear, and cubic. Its additional features include emulated downsampling to 1-bit resolution and a comprehensive suite of filter options like low, band, high, cut, and peak filters modeled after iconic designs. Users can also craft dynamic soundscapes with curveable envelopes and modulating LFO contours, allowing for intricate control over the audio's evolution.

Sifft is well-suited for experimental sound design and percussion resynthesis, especially when combined with its frequency shifting capabilities. Beyond the standalone plugin, the core processing engine is available as a module for SynthEdit users and includes C++ source code with detailed documentation. This makes Sifft not only a creative tool for musicians but also a valuable resource for developers interested in audio processing techniques.