Rubber Band Library

Rubber Band Library is an exceptional software library meant for audio time-stretching and pitch-shifting. This software library enables users to modify pitch and tempo of audio streams or recordings in a dynamic and independent manner. It is designed primarily for developers who want to use its features while creating customized application programs. However, the Rubber Band Library also offers a simple, free command-line utility program that allows end-users to make fixed adjustments to the pitch and speed of existing audio files.

Rubber Band Library has an impressive track record, being employed in applications such as the Ardour digital audio workstation (both Classic and SAE editions), the SooperLooper live looping sampler, and the QTractor sequencer, and Breakfast Quay's Rubber Band Audio Processor.

It is essential to note that Rubber Band Library provides proprietary licensing for commercial applications as well. The program's functionality is top-notch, providing a plethora of dynamic features to developers and end-users alike. Overall, if you are in the market for a high-quality time-stretching and pitch-shifting software library, Rubber Band Library should undoubtedly be at the top of your list.