HarmonEye allows you to see what you hear. What looks like a retina of an eye is a unique software application that listens to the music and shows you the tones and chords being played. From any audio. In real-time. From that, you can easily see the melody, chords and the key of your favorite songs. Including the nuances like a singer’s vibrato. You can write it down, or just look at it for hours and be amazed by your new absolute pitch.

Features:

• Visualizes the tones from the music in a circle
• Tones from all octaves are aggregated into a single one
• Each tone bin is yet divided to see vibrato, slides, etc.
• Switch to the circle of fifths (e.g., to see modulations between keys)
• Switch to the accumulation mode to average the tones over time
• Pause!
• Works in real-time
• Takes music from the default audio input (e.g., microphone, line-in)
• With the Soundflower driver, route system audio output and listen to iTunes, YouTube, anything

Note: While the software is classified as free, it is actually donationware. Please consider making a donation to help support development.