Let's Bend: Harmonica Tuner

Let's Bend: Blues Harmonica Tuner & Trainer assists harmonica players in accurately hitting bending notes through real-time visualization.

The application is completely free, ad-free, and can be used without registration. Sounds are captured via the MediaRecorder library as a continuous data stream, analyzed using advanced pitch detection algorithms, and displayed in real-time.

All common keys and special tunings of your blues harps are supported and can be easily configured via the settings menu.

Features:
• Fast and accurate musical note detection
• Multiple pitch detection algorithms (YIN, MPM, and HYBRID)
• Support for all common harmonica keys and tunings
• Adjustable concert pitch settings
• Visualization of blow bends, draw bends, over blows, and over draws
• Customizable confidence settings for pitch detection

Technical Details (for developers):
• Open-source project available on GitHub
• Built using Model-View-Controller (MVC) architecture
• Developed with Gradle build system
• Requires Android 9 (API 28) or higher
• Uses Dagger for dependency injection
• Implements SLF4J for logging
• Optimized for privacy (no data collection or storage)
• Part of a multi-platform project that includes desktop (macOS, Linux, Windows) and web versions

The app is also available for desktop platforms and as a web application at https://letsbend.de

Enjoy and Let's Bend!

Recent changes:
• Smoother display: less flickering for notes, chords and pitch detection
• Training: notes must now be held steadily to count – no more accidental hits
• Training: next note advances immediately, even after silence
• Training: fixed a crash during training sessions
• Cleaner runtime output