reTuner

reTuner is a free, open-source audio plugin that converts music between tuning standards like A440 and A432 while maintaining exceptional audio quality. Powered by the Rubber Band Library and built with the JUCE framework, reTuner delivers artifact-free pitch shifting for musicians, producers, audio engineers, and wellness content creators.

Key Features

• High-quality pitch shifting - Professional-grade algorithms from the open-source Rubber Band Library.
• Precise frequency control - Adjust source and target A4 frequency from 380-460 Hz with volume control.
• Universal plugin compatibility - Available in VST3, LV2, CLAP, AU formats plus standalone application.
• Cross-platform support - Works on Windows, macOS, and Linux.
• Open source freedom - GPL-3.0 licensed and community-developed.

Perfect For

• Converting A440 to A432 Hz for meditation and healing music.
• Adapting vintage recordings to match modern tuning standards.
• Creating wellness and therapeutic audio content.
• Audio post-production, restoration, and mastering workflows.

Technical Specifications

• Pitch range: ±3 semitones (380-460 Hz A4 tuning).
• Volume range: -60 dB to +12 dB.
• Latency: Optimized for real-time processing.
• Processing: Formant-preserving pitch shift algorithm.