Sparkle is an iPhone application developed by Alessandro Petrolati. It falls under the category of Multimedia, specifically Music & Radio. Sparkle is a powerful tool that allows users to perform advanced spectral hybridizations using various algorithms that operate on the frequency domain.

With Sparkle, users can create high-quality sound transformations by preserving the envelope and synchronizing the phase of different sounds. The main concept behind Sparkle is to transfer the temporal structure of one sound onto another sound while preserving its spectral properties.

In simpler terms, Sparkle enables users to take a voice and make it sing a Beethoven's symphony or any other sound they desire. The possibilities for creative sound manipulations are endless with Sparkle's advanced spectral hybridization capabilities.