Originally published April 13, 2025 | Updated June 12, 2025

Mastering Suno AI’s In‑Song Editor (v4): Full Breakdown for Creators

By Jack Righteous – jackrighteous.com

Suno AI’s in-song editor, introduced in version 4, allows creators to refine tracks directly—without needing external tools. Learn how to use Replace, Extend, Crop, Fade, and in-place lyric edits like a pro.

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Overview: What Is the In-Song Editor?

Suno’s in-song editor is a suite of integrated tools designed to fine-tune songs after generation. In version 4, it includes:

• Replace Section – Regenerate part of a song with new lyrics or style.
• Extend – Add new parts to a song (intro, bridge, outro).
• Crop – Trim unwanted parts from beginning or end.
• Fade Out – Add smooth endings with [fade] and [end] tags.
• Edit Displayed Lyrics – Clean up public-facing lyric metadata.

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Replace Section

Select a part of your track and regenerate it without affecting the rest. The tool uses context to blend seamlessly with the surrounding content.

• Edit lyrics and regenerate the section.
• Choose from 2 AI versions.
• Auto-integrate into the final song.

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Extend (Song Extension)

Add entirely new sections like verses, choruses, or outros. This is how you grow a track organically.

• Input new lyrics and prompt style.
• Get a new “Part 2” audio section.
• Combine the new and original into a single full track.

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Crop Tool

Keep only the part of the song you want by selecting a waveform range.

• Remove dead space at the start or end.
• Focus on a specific section (e.g., verse only).
• Create previews or short clips.

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Fade Out (Prompt Tags)

Add [fade] near the end of your lyrics or prompt to trigger a smooth fade. Pair it with [end] for clean exits.

Example:

[fade] We’ll find a way  
[end]

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Edit Displayed Lyrics

This controls what the listener sees. It doesn’t affect the actual song but helps keep things professional.

• Fix misinterpreted lines.
• Clean up duplicates.
• Add song titles or credits to metadata.

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How It Works Technically

• Replace and Extend maintain musical context on both ends.
• Maximum generation time per section: ~3 minutes 15 seconds.
• Available only to desktop users with Pro or Premier plans.
• Each edit creates a new version—your original stays intact.

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How It Works with Remasters and Covers

Remasters

• Start editing from the remastered version for better consistency.
• Some tone or vocal differences may occur.
• Use Replace Section to fix remaster artifacts.

Covers

• Editor still works, but melodies are already changed.
• Replacing parts may cause phrasing shifts—review carefully.
• Extensions reflect the Cover’s style, not the original’s.

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Known Issues

• Replaced sections may feel off in tone or mix.
• Extend can change style or sometimes fail to generate.
• Cover songs may get cut around the 3:00–3:30 mark.
• Remastered songs might retain older version artifacts.

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Power Tips

• Always pair [fade] with [end] for clean outros.
• Use Extend first, then Replace to refine.
• Use “Edit Displayed Lyrics” last to clean up exports.
• Write lyrics phonetically if needed (e.g., “Noo Yawk” instead of “New York”).

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What to Try Next

• Replace a weak verse in your current song.
• Extend a Remastered track with a fresh outro.
• Customize a chorus in your Cover version.

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Go Deeper with Suno AI – Your Creator Toolkit

Explore the full series and take control of your AI music output:

• Suno Remaster Guide
• Suno Covers Guide

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5-Part Suno Editor Breakdown

1. Replace Section
2. Extend
3. Remove
4. Crop + Fade
5. Feedback + Feature Requests

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