Suno Replace Section

Replace a specific time range within a Suno-generated track with new content.

Overview

Suno Replace Section targets a precise time range within an existing Suno track and regenerates that portion based on a prompt and style tags. This allows surgical editing of specific sections (e.g., replacing a weak verse or changing a chorus) without regenerating the entire song. The node requires a Suno Task ID and Audio ID from an upstream node.

Configuration

Field	Type	Default	Description
Start Time	number (seconds)	0	Beginning of the section to replace (minimum 0).
End Time	number (seconds)	30	End of the section to replace. The replaced interval (End − Start) must be between 6 and 60 seconds and at most 50% of the song — the end timestamp itself can be anywhere in the track (e.g. 100s→130s is valid).
Prompt	string	""	The new lyrics/content for the replaced section (required). Max 5000; longer input is truncated rather than rejected.
Tags	string (max 500)	""	Style/genre tags for the replacement section (required).
Title	string (max 80)	""	Optional title for the replacement.
Full Lyrics	string	""	Complete post-edit lyrics of the whole song — modified and unmodified parts combined. Suno uses it as the full lyric sheet after the replacement.
Negative Tags	string (max 500)	""	Styles to exclude from the replacement segment (e.g. “rock”).
Task ID	string	""	Suno task ID — auto-filled from a connected Suno node, or paste one manually to edit a track from an earlier session.
Audio ID	string	""	Suno audio ID — auto-filled from a connected Suno node, or paste one manually.
promptPrefix / promptSuffix	text	–	Optional pre/post text wrapped around the prompt at run time (settings panel → Pre & post text; hidden from app users; captured by presets). See Prompt pre & post text.

Inputs & Outputs

• Inputs: audio – Suno task ID and audio ID from an upstream Suno node
• Outputs: audio – modified audio URL with the replaced section

  Best Practices

• Keep the replacement window (End − Start) between 6 and 60 seconds – shorter or longer intervals are not supported. The window can sit anywhere in the track.
• Provide Full Lyrics (the complete post-edit lyric sheet) so Suno blends the replacement into the song’s overall lyrics coherently.
• Provide both a descriptive prompt and relevant tags for the best replacement quality.
• Listen to the source track carefully to identify precise start and end timestamps before replacing.
• Use this node iteratively to refine individual sections without affecting the rest of the song.
• This is efficient for iterative editing compared to full regeneration.

Common Use Cases

• Fixing a weak verse or chorus in an otherwise good generation.
• Changing the mood or style of a specific song section.
• Replacing lyrics in a targeted section while keeping the rest intact.
• Iterative song refinement: generate a full track, then surgically improve individual parts.
• Experimenting with different bridges or transitions between sections.

Tips

• The replaced interval (End − Start) must be 6–60 seconds; the timestamps themselves are unrestricted.
• Both Task ID and Audio ID are resolved automatically when connected to an upstream Suno node — a live connection overrides manual values. Copy them from a Suno Generate node (shown under its player) to edit a track from an earlier session.
• The Tags field is required by the backend validation – always provide at least basic genre tags.
• This is one of the most cost-efficient Suno nodes, making it ideal for iterative refinement workflows.