Karaoke Sync™ - User Tutorial

Getting Started

When you first open Karaoke Sync, you'll see the main screen with options to create a new project or access your saved projects.

Free vs Pro

• Free: 10 lifetime exports, 10 projects
• Pro: Unlimited exports and projects

Creating a Project from Audio

Use this option when you have a song file (MP3, M4A, WAV) on your device.

Step 1: Tap the Import Tab

Tap the + button at the bottom of the screen.

Step 2: Select "Audio File"

Make sure "Audio File" is selected at the top.

Step 3: Choose Your Song

Tap "Select Audio File" and browse to your song. Supported formats: MP3, M4A, WAV, FLAC, AAC.

Step 4: Project Created

After selecting a file, the project is automatically created using the audio filename as the project name. You'll see the main editor with the waveform.

Creating a Project from YouTube

Use this option to create karaoke timing for any YouTube video.

Step 1: Tap the Import Tab

Tap the + button at the bottom of the screen.

Step 2: Select "YouTube Video"

Tap "YouTube Video" at the top of the Import screen.

Step 3: Paste the YouTube URL

Copy a YouTube video URL and paste it into the URL field. The app supports:

• youtube.com/watch?v=...
• youtu.be/...

Step 4: Create Project

The video title will auto-fill. Tap "Create Project" to proceed.

Adding Lyrics

After creating a project, you'll see the main editor with a waveform (for audio) or video player (for YouTube).

Step 1: Tap "Import"

Tap the Import button to open the lyrics import screen.

Step 2: Paste Your Lyrics

• Copy lyrics from a lyrics website
• Paste them into the text field
• Each line should be on its own line
• The app automatically parses your lyrics and shows a line count

Tip: You can also paste LRC format lyrics (with timestamps like [00:15.50] Lyrics here) and the app will detect and import the timestamps automatically.

Step 3: Tap "Import Lyrics"

Tap the "Import Lyrics" button to add the lyrics to your project.

Timing Your Lyrics

This is the core feature - syncing each lyric line to the exact moment in the song.

Step 1: Tap "Timing"

Tap the Timing button on the Home view to open the timing editor.

Step 2: Tap "Start Timing"

Tap the Start Timing button to begin the timing process. The song will start playing.

Step 3: Listen and Mark Each Line

When you hear the moment a line should appear, tap the "Mark" button (or tap the lyric line itself). The current playback time will be saved as that line's timestamp.

Step 4: Continue Through the Song

Repeat for each line. The app will automatically advance to the next line after you mark one.

Step 5: Save

When finished, tap "Save" to save your timing.

Fine-Tuning Timestamps

After initial timing, you may want to adjust some timestamps for perfect sync.

Step 1: Tap a Lyric Line

In the editor, tap any lyric line to select it.

Step 2: Tap "..."

Tap the ... button to open fine-tune adjustment options.

Step 3: Adjust the Timestamp

Use the +/- buttons to adjust by:

• 0.1 seconds - for small adjustments
• 0.5 seconds - for medium adjustments
• 1.0 second - for larger adjustments

Step 4: Preview

Tap the timestamp to jump to that position and hear if it sounds right.

Tip: You can also adjust "Past lines" or "Future lines" to shift multiple timestamps at once.

Practice Mode

Practice singing along without recording.

Step 1: Open a Project

From the Library, tap a project to open it.

Step 2: Tap "Practice"

Tap the Practice button in the action row.

Step 3: Sing Along

• Lyrics auto-scroll with the current line highlighted
• Tap any line to jump to that position
• Use wired headphones to hear yourself in real-time (passthrough)

Step 4: Exit

Tap the X or back button to exit Practice mode.

Recording Mode

Record your voice while the music plays for a karaoke experience.

Step 1: Open a Project

From the Library, tap a project with local audio (not YouTube).

Step 2: Tap "Record"

Tap the Record button (microphone icon).

Step 3: Allow Microphone Access

If prompted, allow microphone access.

Step 4: Get Ready

A 3-2-1 countdown will appear before recording starts.

Step 5: Sing!

• The music plays while your voice is recorded
• Lyrics auto-scroll with highlighting
• Use wired headphones for real-time voice monitoring

Step 6: Save Recording

Tap "Save" when finished.

Step 7: Preview Your Recording

Listen to your voice mixed with the music. Adjust the voice sync offset if needed.

Step 8: Export or Re-record

• Export: Save the mixed audio (voice + music) as M4A
• Re-record: Try again (overwrites previous recording)

Note: Recording and exporting is only available for audio file projects, not YouTube projects.

Exporting Your Project

Export your timed lyrics in various formats.

Step 1: Open Export Options

In the project editor, tap "Export" or the share icon.

Step 2: Choose a Format

Step 3: Save the File

The file will be saved to your Downloads or shared via the share sheet.

Note: Free users have 10 lifetime exports. Pro users have unlimited exports.

Managing Projects

Viewing Your Projects

Tap the Library tab to see all saved projects.

Opening a Project

Tap any project to open it in the editor.

Renaming a Project

In the editor, tap the menu button (three dots) and select "Rename" to change the project name.

Deleting a Project

In the Library, swipe left on a project and tap "Delete".

Pro Subscription

Upgrade to Pro for unlimited exports and projects.

How to Subscribe

1. Tap the Settings tab
2. Tap "Upgrade to Pro"
3. Choose Monthly or Yearly
4. Confirm with Face ID / Touch ID

Managing Your Subscription

To cancel or manage your subscription:

1. Open iPhone Settings
2. Tap your name at the top
3. Tap Subscriptions
4. Find Karaoke Sync and manage from there

Tips & Tricks

1. Use wired headphones for Sing and Practice modes - Bluetooth has too much latency for real-time monitoring
2. Import LRC files - If you find lyrics with timestamps online, paste them directly and the app will import the timing
3. Tap timestamps to preview - Click any timestamp to jump to that position in the song
4. Fine-tune in small increments - Use 0.1s adjustments for perfect sync
5. YouTube for practice - Great for practicing with music videos, but you can't record or export audio from YouTube projects