AI AI Tools Guidebook
Troubleshooting

Suno Lyrics Not Followed — Custom Mode Fix

You wrote lyrics, Suno improvised. Structure tags + lyric mode help.

Published: Author: AI Productivity Guide Team 🌐 查看中文版本

You wrote 200 words of lyrics and Suno sang something else entirely — not because the model is “improvising”, but because it treated your text as a theme description rather than lyrics. Suno’s Custom Mode follows your text word-for-word; Simple Mode treats it as a prompt and writes its own lyrics. 99% of “lyrics ignored” reports are the wrong mode or missing structure tags.

To get Suno to sing exactly what you wrote, use Custom Mode + structure tags + lyric-to-length matching.

Common causes

By how often each one drops the lyrics:

1. Simple Mode instead of Custom Mode

Two modes:

  • Simple Mode: you give a description (“a happy song about coffee”), AI writes lyrics and music
  • Custom Mode: you provide lyrics + style, AI sings your lyrics verbatim

Pasting lyrics into the Simple Mode prompt box → model uses them as theme, rewrites everything.

How to judge: is the “Custom Mode” toggle on at the top of the UI? If off, you’re in Simple Mode.

2. No [Verse] / [Chorus] structure tags

Even in Custom Mode, plain-text lyrics without tags let the model segment lyrics its own way. Common result: the chorus you wrote gets sung as a verse, your verse becomes a bridge — lines get reordered.

How to judge: do your lyrics include [Verse] / [Chorus] / [Bridge] style bracket tags? If no, this is it.

3. Lyric count doesn’t match song length

Suno defaults to 2-3 minute songs. Rough line budget:

LengthLine count (English / Chinese)
1 min12-16 / 8-12
2 min24-32 / 18-24
3 min36-48 / 28-36
4 min50-65 / 40-50

100 lines in a 2-minute song → model has to pick a subset, the rest get dropped.

How to judge: lines/minute > 32 (EN) or > 25 (ZH) means too many.

4. Style describes a vocal-less arrangement

instrumental, background music, lo-fi beats hint “no vocals or sparse vocals” — the model might hum a few lines and skip the rest.

How to judge: does style contain instrumental / no vocals / background music?

5. Special characters / emoji in lyrics

💔, <3, emoji, special markdown — these get filtered as non-text by the model.

6. Using a Persona whose vocal style doesn’t fit your lyrics’ meter

Some Personas are rap-trained but you wrote a ballad — phrasing gets messed up and the lyrics sound mangled.

Shortest path to fix

By lyric-hit rate:

Step 1: Switch to Custom Mode

Top-right of the UI, toggle “Custom Mode” on. You now get two separate fields:

  • Lyrics (left)
  • Style of Music (right)

Lyrics belong only in the Lyrics field — never paste them into Style.

Step 2: Add structure tags

Rewrite lyrics as:

[Verse 1]
I opened that old album
You were laughing on the first page
Outside the rain fell and stopped
Like the promise we never finished

[Pre-chorus]
Late at night I'm still awake

[Chorus]
Turns out you'd already left
What's left is just the echo
Turns out you'd already left
And I'm learning to be alone

[Verse 2]
...

[Bridge]
...

[Chorus]
...

[Outro]
Turns out you'd already left

Tag list (by frequency):

  • [Intro], [Outro]
  • [Verse 1], [Verse 2]
  • [Pre-chorus], [Chorus]
  • [Bridge], [Hook]
  • [Instrumental] (no vocals in this section)
  • [Spoken] (talk, don’t sing)

Step 3: Match line count to song length

Trim or extend to budget:

  • 2-min song: 24-32 EN lines
  • 3-min song: 36-48 EN lines

50+ lines? Split into two parts (part 1 / part 2) or stretch to 4 minutes (v4 supports up to 8).

Step 4: Don’t write vocal-less styles

Avoid:

instrumental, background music, lo-fi beats

Write:

85 BPM, indie pop, soft female vocal, melancholic, fingerpicked guitar

Include vocal explicitly so the model knows lyrics need singing.

Step 5: Strip special characters

Remove from lyrics:

  • All emoji (💔, 🎵)
  • Markdown symbols (bold, italic)
  • HTML (<br>, &amp;)
  • Excess blank lines (don’t leave 3+ empty lines)

Keep: punctuation, single-line breaks, [Section Tags].

Step 6: Still skipped? Force with Replace Section

If a specific section (e.g. bridge) keeps getting skipped:

  1. Generate, then select that section
  2. Replace Section
  3. In the new input, only the lyrics for that section with an explicit [Bridge] tag

Prevention

  • Always use Custom Mode; Simple Mode is for “let me hear something random”
  • Add [Verse] / [Chorus] tags even on short tracks
  • Match line count to length: 2 min ≈ 28 EN lines, 3 min ≈ 42 EN lines
  • Style must include vocal or it may default to instrumental
  • Strip all emoji / markdown / HTML from lyrics

Tags: #Suno #Music #Debug #Troubleshooting

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