Overtone Analyzer is a software application for the interactive recording and exploration of sounds. The visual display of a sound enables the quick recognition of the fundamental melody, the sound color (timbre) and the overtones. It also makes it easy to visually compare audio files. Overtone Analyzer is particularly suited as a feedback tool to practice singing, and to document vocal development over the course of a voice education or therapy. This version is for Mac and requires macOS 10.14 higher.