Suno AI In-Song Editor (v4): Replace, Extend, Crop & More

Gary Whittaker

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

By Jack Righteous – Published April 13, 2025
https://jackrighteous.com/blogs/guides-using-suno-ai-music-creation/suno-in-song-editor-v4-guide

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.

Overview: What Is the In-Song Editor?

Suno’s in-song editor is a suite of integrated editing tools made for creators who want more control after initial song generation. As of v4, it includes:

  • Replace Section – Regenerate part of a song with new lyrics or musical style

  • Extend – Add additional sections beyond the song’s original end

  • Crop – Trim from the beginning or end of a track

  • Fade Out – Add smooth audio endings using in-prompt tags

  • Edit Displayed Lyrics – Clean up lyrics metadata for public display

Replace Section

This feature allows you to select a specific part of the track (verse, chorus, etc.) and regenerate it without affecting the rest. It uses contextual awareness to blend into surrounding content. You can:

  • Edit lyrics and regenerate the section

  • Choose between 2 AI-generated versions

  • Automatically integrate the new section into the full song

Extend (Song Extension)

With Extend, you can add entirely new parts to your song—intro, bridge, chorus, or outro. Key details:

  • Works by entering new lyrics and prompt style

  • Suno generates one or more new sections (“Part 2”)

  • You can combine the extension and original into a “Full Song”

Crop Tool

Crop lets you clean up a track by selecting the part of the waveform you want to keep. Ideal for:

  • Removing dead space at beginning/end

  • Keeping only the verse or chorus

  • Quickly creating previews or clips

Fade Out (Tags)

Add the tag [fade] near the end of your lyrics or prompt to apply a fade-out effect. Pair it with [end] for a clean finish.
Example:
[fade] We’ll find a way
[end]

Edit Displayed Lyrics

This feature lets you update the lyrics text shown alongside your song. You can:

  • Correct misinterpreted lines

  • Clean up duplicates after extensions

  • Add title/credits to metadata

How It Works Technically

  • Replace and Extend both preserve musical context (before/after edits)

  • Max generation window: ~3m15s for new segments

  • Supported on desktop (Pro/Premier only)

  • Edits generate new track versions, original stays untouched

How It Works with Remasters and Covers

Remasters:

  • Editing works well, but start from the remastered version to stay consistent

  • Audio tone, voice, or vibe may differ slightly from the original

  • Replace Section can be used to fix Remaster flaws

Covers:

  • Editor works, but covers already deviate from original melody

  • Replace Section may invent new phrasing—be cautious

  • Extend adds sections in the cover’s current style, not original melody

Known Issues

  • Replaced sections may mismatch in tone/mix

  • Extend may abruptly change style or fail to generate

  • Cover songs might truncate around 3:00–3:30

  • Remastered tracks may still carry v3.5 artifacts

Power Tips

  • Use [fade] and [end] for cleaner exits

  • Extend first, then Replace for refinement

  • Clean up final lyrics with “Edit Displayed Lyrics” before export

  • For precise phonetics, spell lyrics how they sound (e.g., “New Yawk”)

What to Try Next

  • Use Replace Section to fix one weak verse in a song

  • Extend a Remastered track to give it a modern outro

  • Try replacing a chorus in a cover with custom lyrics

🎧 Go Deeper with Suno AI v4 – Your Creator Toolkit

Now that you’ve got the basics, explore each core tool in detail:

🧰 5-Part Suno Editor Breakdown

This deep-dive series explains how to use Suno’s most powerful v4 editing tools:

  1. Replace Section – Fix any part of your track without redoing it all.
    https://jackrighteous.com/blogs/guides-using-suno-ai-music-creation/replace-section-suno-editor

  2. Extend – Add new verses, choruses, or bridges with control.
    https://jackrighteous.com/blogs/guides-using-suno-ai-music-creation/extend-suno-song

  3. Remove – Clean up what doesn’t belong — mid-track or anywhere.
    https://jackrighteous.com/blogs/guides-using-suno-ai-music-creation/remove-section-suno-song

  4. Crop + Fade Out – Finalize your intro/outro like a pro.
    https://jackrighteous.com/blogs/guides-using-suno-ai-music-creation/crop-fade-out-suno-song

  5. Feedback + Feature Requests – Speak up and shape the future of Suno.
    https://jackrighteous.com/blogs/guides-using-suno-ai-music-creation/suno-editor-feedback

📦 Ready to Build Your AI Music System?

Grab your free starter kit below. It’s loaded with checklists, workflows, and tools made for real creators using AI:

🎁 Download the GET JACKED Free AI Starter Kit
https://jackrighteous.com/products/get-jacked-ai-starter-kit

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