SolPlayer Tune by foresthill

YouTubeをその場で432Hz等に変換して聴く（保存・ダウンロードは一切しません） Listen to YouTube in 432Hz. Converts the audio of the video you are watching to alternative tunings (432/444Hz or any custom frequency) in real time, entirely in your browser. No downloading, no recording)

Available on Firefox for Android™

0 (0 reviews)

Download Firefox and get the extension

Download file

Scan the QR code to open this extension in Firefox for Android

About this extension

SolPlayer Tune converts the audio of the YouTube video you are watching to alternative tunings in real time — entirely inside your browser.

■ How to use
1. Open any YouTube watch page
2. A "♪ 440Hz" button appears below the video
3. Tap it to open the tuning panel and pick 432Hz (or 444Hz)
4. Pick "440Hz standard" to return to the original, unprocessed audio

■ Features
• One-tap presets: 440 (standard) / 432 / 444 Hz
• Custom frequency with up to 10 decimal places (200–999 Hz)
• Save your own frequencies as personal presets
• Selecting 440Hz fully bypasses processing (zero latency, zero overhead)
• Works on desktop Firefox and Firefox for Android

■ Privacy
No data collection, no analytics, no network requests. Audio is processed in real time and never recorded, stored, or downloaded. Your settings stay in your browser.

Note: while conversion is active, audio lags ~0.2–0.3s behind the video (buffering required for real-time pitch shifting). This is expected and does not affect music listening.

Rated 0 by 0 reviewers

SolPlayer Tune by foresthill

Required permissions:

Data collection: