This is a collection of free waveforms for the experimental synth/patch programmer that uses a sampler for waveform playback instead of oscillators in a synth, all samplers more or less have a unique sound, and new sounds can be sculpted with that sound by using it's ADSR and builtin effects (if any) or by processing it further with external plugins and effects. It may not be the excellent waveforms that makes this free collection so good but the extensive format support.