Raven Lite

Raven Lite is a free software program that lets users record, save, and visualize sounds as spectrograms and waveforms.

Raven Lite is intended for students, educators, and hobbyists, and can be used for learning about sounds, as an aid in birdsong recognition, and in musical instruction.

Raven Lite has been developed primarily as an interactive sound visualization tool for novice through advanced users who want to visualize sound in exciting ways.

Note: You have to register on the product website to take advantage of the full free Raven Lite.