KeyFinder

KeyFinder is a free, open-source application for estimating the musical key of digital audio recordings to aid DJs in harmonic and tonal mixing. Written by Ibrahim Shaath, it is deliberately focused purely on key detection.

It is aimed at DJs and producers who want a fast, no-frills key detection workflow, available for macOS and Windows. It writes detected keys to file metadata tags and supports many audio codecs.

• Estimates the musical key of audio recordings
• Open-source under the GPL v3 license
• Focused tool with no library management or media player
• Writes detected keys to metadata tags
• Supports a wide range of audio codecs
• Highly configurable for different genres