The Swell Game

Welcome to The Swell Game! 🎵

The Swell Game helps flute players master dynamic control (swells - crescendo and diminuendo) while maintaining perfect pitch stability. Practice any note in various historical tuning systems and get instant visual feedback.

How to Use:

1. Choose your settings - Open the sidebar (☰) to select:
   • A4 Frequency - Standard is 440 Hz (orchestras vary 440-442 Hz)
   • Tuning System - Equal Temperament (modern), Pythagorean, Just Intonation, or historical temperaments
   • Target Note - The note you want to practice
2. Play Reference Tone - Hear the target pitch to match
3. Start Recording - Play your note with a swell (soft → loud → soft)
4. Review Results - See your pitch accuracy and dynamic range visualized!

Understanding the Visualization:

• Blue line - Your actual pitch over time
• Black line (0¢) - Perfect pitch target
• Gray shaded area - Your volume (amplitude) changes
• Cents (¢) - Pitch deviation (100¢ = 1 semitone). ±3¢ is excellent!

Your Score:

The performance score combines two factors:

• Dynamic Range (dB) - How much volume variation you achieved (higher is better)
• Pitch Stability (¢) - How steady your pitch stayed (lower is better)

Goal: Wide dynamic range with minimal pitch deviation!

Playback Options:

• Play Recording - Hear your actual performance
• Play Synthesized - Hear a pure sine wave following your detected pitch/amplitude (helps diagnose pitch detection accuracy)

Hands-Free Foot Pedal Control:

Perfect for practicing with your hands on your flute! Use a foot pedal controller with these keyboard commands:

• Page Down - Cycle through modes (the selected button will be highlighted with a glowing border)
• Page Up - Execute the current mode

Four Modes:

1. Reference Tone - Play/stop the target pitch
2. Record - Start/stop recording your performance
3. Playback Recording - Play/stop your actual recording
4. Playback Synthesized - Play/stop the synthesized version

This allows complete hands-free operation - perfect for when your iPad is on a music stand!

Tips for Best Results:

• Use headphones or earbuds for cleaner recording
• Record in a quiet environment
• On iPad: Adjust Input Gain if recording is too quiet/loud
• Try different Smoothing values if pitch line looks jittery

Share Your Results:

Hit Share Results to create a shareable image of your performance. Challenge your flute friends to beat your score!

Privacy Note: This app uses Google Analytics to collect anonymous usage data (like which features are used most) to help us improve. We also use cookies to save your settings (target note, tuning system, etc.) so they're remembered when you return. No personally identifiable information is collected. Your audio recordings are processed locally in your browser and never uploaded to our servers unless you choose to share them. See our Privacy Policy for details.

If PracticeTools has been useful, consider ☕ buying me a coffee to support development.

Got It - Let's Play!

Terms of Service

1. Acceptance of Terms

By accessing and using The Swell Game ("the App"), you agree to be bound by these Terms of Service. If you do not agree, please do not use the App.

2. License and Restrictions

The Swell Game grants you a limited, non-exclusive, non-transferable license to use this App for personal practice purposes. You may NOT:

• Copy, modify, or reverse engineer the source code
• Create derivative works or competing products
• Remove copyright notices or branding
• Use the App for commercial purposes without permission
• Attempt to access or copy the underlying algorithms

3. Intellectual Property

All source code, algorithms, design elements, and content are the proprietary property of The Swell Game and are protected by copyright law. The pitch detection algorithms and visualization systems are proprietary technology.

4. User Content

When you share recordings via the "Share Results" feature:

• Shared images are public and can be viewed by anyone with the link
• You retain ownership of your performance recordings
• You grant The Swell Game the right to display shared content
• The Swell Game may remove inappropriate content at its discretion

5. Age Requirement

You must be at least 13 years old to use this App.

6. Privacy & Data Collection

The App uses Google Analytics to collect anonymous usage data (page views, feature usage). No personally identifiable information is collected. Audio recordings are processed locally in your browser and are not uploaded to our servers unless you choose to share them.

7. Third-Party Services

The App may display advertisements via Google AdSense. Ad providers may use cookies for tracking. See Google's privacy policy for details.

8. Disclaimer

THE APP IS PROVIDED "AS IS" WITHOUT WARRANTIES OF ANY KIND. The Swell Game makes no guarantees about pitch detection accuracy, though we strive for the highest quality.

9. Limitation of Liability

The Swell Game shall not be liable for any damages arising from use of the App.

10. Changes to Terms

We reserve the right to modify these terms at any time. Continued use constitutes acceptance of updated terms.

11. Contact & DMCA

For questions, concerns, or to report copyright infringement: Send us a message

Last Updated: February 2026

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Privacy Policy

The Swell Game respects your privacy. This policy explains what data we collect and how it's used.

Data We Collect

We use Google Analytics to collect anonymous usage statistics:

• Page views and session duration
• Which features you use (recording, playback, sharing)
• Target notes and tuning systems selected
• Device type (iOS/iPad vs desktop)
• Browser type and general location (country-level)

What We DON'T Collect

• No names, emails, or accounts - The app works anonymously
• No audio recordings - Your recordings are processed locally in your browser and never sent to our servers
• No personally identifiable information (PII)

How Your Data is Used

Analytics data helps us:

• Understand which features are most useful
• Identify bugs and performance issues
• Decide what improvements to make
• See overall usage trends (not individual users)

Shared Recordings

When you click "Share Results," you create a shareable image:

• The image contains your performance visualization and stats
• You control where you share it (social media, messages, etc.)
• The image is public to anyone who has the link/sees your post
• No audio is included, only a static image

Cookies & Tracking

We use cookies for:

• Saving your settings - Your preferred target note, tuning system, and A4 frequency are saved in cookies so they persist when you return (stored for 1 year)
• Google Analytics tracking - To understand how people use the app
• First-visit detection - So the help modal only shows once (stored in localStorage)
• Google AdSense - If ads are displayed, Google may use cookies for ad targeting (see Google's privacy policy)

Third-Party Services

We use these external services:

• Google Analytics - Privacy Policy
• Google AdSense - Privacy Policy

Your Rights

Since we don't collect personal information:

• There's no account or data to delete
• You can block cookies using your browser settings
• You can opt out of Google Analytics using browser extensions

Children's Privacy

This app is intended for users 13 and older. We do not knowingly collect data from children under 13.

Changes to This Policy

We may update this policy occasionally. Continued use constitutes acceptance of updates.

Contact

Questions about privacy? Send us a message

Last Updated: February 2026

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