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User Guide
Kell Win edited this page Jan 22, 2026
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1 revision
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Upload Audio: Click the
📂 MP3button (or the large music note icon) to select your audio file.- Supported Formats: MP3, WAV, OGG (browser dependent).
- Note: Once uploaded, a waveform will generate automatically.
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Load Lyrics: Click
📝 Lyrics. Paste your lyrics into the text box and click "Load Lyrics".- Tip: Ensure your lyrics are broken into lines exactly how you want them to appear on screen.
This is the heart of GlassSync. The workflow is designed for rhythm and speed.
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Start the Music: Press
Spacebaror click▶ Play. -
Tap to Sync: When the singer sings the highlighted line, press the
Down Arrow (↓)or the greenSync Nextbutton.- The line will turn Green (Synced).
- The focus will instantly jump to the next line.
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Repeat: Keep tapping the
Down Arrowto the beat of the vocals until you reach the end.
GlassSync allows you to fix mistakes without reloading the page.
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Undo (Up Arrow): If you press sync too early or late, press
Up Arrow (↑).- This resets the current line.
- It rewinds the audio to the start of that line so you can try again immediately.
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Special Behavior: If you are on the very first line, pressing Up will sync it to
00:00.00.
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Fine Tuning: Use the
←and→arrow keys to nudge the current timestamp backward or forward by 0.1 seconds. -
Delete Lines: Click the small
×button on the right side of any line to remove it (useful for removing instrumental breaks or duplicate chorus lines).
- Waveform: The blue waveform at the top represents your audio. You can click or drag anywhere on the waveform to scrub through the song instantly.
- Scrubber: A standard slider is available in the middle of the controls for coarse seeking.
Click the 👁️ Preview button to open the Karaoke view.
- This overlays the lyrics on a dark background.
- Click-to-Seek: Click any line in the preview window to jump the audio exactly to that timestamp.
- Use the bottom slider to scrub through the preview.
When finished, click Download SRT. This will generate a file named lyrics.srt which you can use with YouTube, VLC, or other media players.