You wrote a careful 400-character style prompt covering BPM, key, instrumentation, mood, mix references, vocal timbre, and arrangement — and the generated song only nails the first two attributes. Everything from the middle onward got ignored. Suno enforces a hard character limit per field (around 200 chars for the style prompt on v3.5, around 1000 for v4), and once you cross it the rest is silently dropped with no warning toast. The fix is to figure out what the cap is for your current model, then redistribute information across style, lyrics, and weight-bearing descriptors instead of cramming everything into one box.
Common causes
1. Style field hit its character cap
The style box has the smallest cap of the three input fields. Anything past it is discarded before generation. Suno does not show a counter for v3.5 and only shows one on v4.5+, so it is easy to write a 500-char prompt without realizing 60% of it was ignored.
How to judge: Paste your style prompt into a character counter. If it exceeds 200 (v3.5), 500 (v4), or 1000 (v4.5+), assume truncation.
2. Conflicting descriptors near the cap
If the cap chops mid-sentence, the model loses any qualifier that was supposed to balance an earlier one. “Aggressive but melodic” becomes “Aggressive” if the truncation lands between the two halves.
How to judge: Output is more one-sided than your prompt described — the missing nuance was likely on the dropped side.
3. Lyrics box also has a cap and overflow drops the outro
The lyrics field caps around 3000 characters depending on model. Long lyric sheets get truncated at the end, which is why outros and final choruses sometimes feel cut off or completely fabricated.
How to judge: Compare the lyrics field content to what the song actually sings. If the song stops or improvises before the last 30% of your lyrics, the cap chopped them.
4. Hidden tokens count against the cap
Section tags like [Verse 1], [Chorus], [Bridge], and meta tags eat the cap too. A 200-char “real” prompt can balloon to 280 once tags are counted.
How to judge: Strip the tags and count again. If you were under cap without tags and over with tags, the tags are the overhead.
5. Non-ASCII characters count as multiple
CJK characters, emoji, and curly quotes sometimes count as 2-3 characters in Suno’s internal counter. A 180-char prompt in English may be a 300-char prompt internally if it contains Chinese or pasted smart quotes.
How to judge: Replace CJK and emoji with ASCII equivalents, regenerate. If the new song respects more of the prompt, encoding was inflating your count.
6. Custom Mode toggled off, so style is interpreted as a vague seed
In simple (non-Custom) mode, Suno treats the style field as inspiration, not instruction, and may use only the first 100 characters. Without Custom Mode on, even a 150-char prompt can be under-applied.
How to judge: Toggle Custom Mode on and regenerate the same prompt. If the song now follows more descriptors, simple mode was filtering, not truncating.
Before you start
- Note which model you are on (v3.5, v4, v4.5, v5) — each has different caps.
- Capture the exact prompt you used, character count, and whether Custom Mode was on.
- Re-listen to the failed song and write down which descriptors were honored vs ignored — that pinpoints the truncation boundary.
Information to collect
- Full style prompt, lyrics, and any section tags you used.
- Character count of each field, with and without section tags stripped.
- Model version, Custom Mode on/off, output count setting.
- The generated song’s title and a one-line description of what it actually produced.
- Whether the prompt contains CJK, emoji, or pasted smart quotes.
- Which descriptors made it into the output and which were dropped.
Step-by-step fix
Step 1: Measure the prompt, identify the boundary
Paste your style prompt into a plain-text editor or character counter. Compare against the model cap:
| Model | Style cap | Lyrics cap |
|---|---|---|
| v3.5 | ~200 | ~3000 |
| v4 | ~500 | ~3000 |
| v4.5 | ~1000 | ~5000 |
| v5 | ~1000 | ~5000 |
If you are over, the rest was dropped. Plan to fit within cap minus a 10% safety margin.
Step 2: Move song-form info from style to section tags
Things like structure, dynamics, and section transitions belong inside the lyrics box as tags, not in the style box:
[Intro - soft, fade in]
[Verse 1]
your verse lyrics here
[Chorus - big, layered harmonies]
your chorus lyrics here
[Bridge - drop drums, vocal solo]
your bridge lyrics here
[Outro - fade out]This frees up 50-100 chars in the style field for actual sonic descriptors.
Step 3: Compress style to weight-bearing words only
Cut filler words. The model responds to nouns and adjectives, not connectors:
Before (240 chars):
"A song that is 90 BPM, with a melancholic indie feel, in a minor key,
using fingerpicked acoustic guitar, with soft drums and a gentle female vocal,
inspired by Phoebe Bridgers and Sufjan Stevens, with reverb and warm mix"
After (160 chars):
"90 BPM, melancholic indie, minor key, fingerpicked acoustic,
soft drums, gentle female vocal, Phoebe Bridgers / Sufjan Stevens vibe,
reverb-heavy warm mix"Same intent, 33% shorter, all under cap.
Step 4: Use Custom Mode for full prompt respect
Toggle Custom Mode on. In Custom Mode, the style and lyrics fields are treated as instructions, not seeds. Simple mode treats them more loosely and under-applies descriptors even when under cap.
Custom Mode → on
Style: your compressed prompt
Lyrics: your lyrics with section tags
Title: descriptive (also influences the song slightly)Step 5: For long lyrics, split into two generations and stitch
If your lyrics legitimately need 4000+ chars, generate the first half as one song with [Outro] removed, then use Extend on it with the second half. Each half stays under cap.
Generation 1: Verses 1-2 + Chorus 1-2 (~2500 chars)
Extend: Verse 3 + Chorus 3 + Bridge + Final Chorus + Outro (~2200 chars)Result is one continuous track with no character cap collision.
Step 6: ASCII-clean the prompt before submitting
If you pasted prompts from Word, Notes, or a Chinese editor, run them through:
- Replace curly quotes with straight quotes.
- Strip non-essential emoji and decorative symbols.
- For CJK style descriptors, translate to English (Suno’s English understanding is much stronger than CJK).
A 250-char “CJK-heavy” prompt often fits in 180 chars after this clean-up.
Verify
- Re-listen to the new generation against your descriptor list — count which made it in. Target: 80%+ of style descriptors honored.
- The song respects the structural tags (intro is soft, bridge has the described drop).
- Lyrics in the output match your lyrics box through the final chorus, not improvised at the end.
- v4.5+ users: the visible character counter shows you under the cap with margin to spare.
Long-term prevention
- Save 5-8 known-good style templates that are pre-fit to cap and ASCII-clean. Start every new song from a template, not a blank box.
- Treat song-form (intro / verse / bridge / outro) as lyrics-side, sonic-character (BPM / key / instruments / vocal) as style-side. Never mix the two.
- Bookmark a character-counter web page; paste prompts in before generating.
- For projects in CJK, write the style descriptors in English even if your lyrics are in Chinese / Japanese — Suno responds better and the cap is more honest.
- Whenever a generated song misses a descriptor, log it. Patterns of “always drops the third descriptor” usually point at recurring truncation.
Common pitfalls
- Adding more words to “be more specific” — past the cap, more words mean more dropped words, not more specificity.
- Using long sentences with subordinate clauses — the model parses comma-separated descriptors much better than prose.
- Putting structure cues in the style box (“starts soft, builds to a loud chorus, ends quietly”) — structure goes in lyrics tags.
- Pasting from Notion or Word and inheriting smart quotes that secretly double the char count.
- Assuming Custom Mode is on when it is not — check the toggle before every generation.
FAQ
Q: How do I know the exact character limit on my plan? A: Suno does not document caps officially. v4.5+ shows a counter. For older models, the safe assumption is 200 chars for style, 3000 for lyrics. Stay 10% under those for headroom.
Q: Does the title field count against the style cap? A: No — title is a separate field with its own small cap (about 80 chars). It influences the song slightly but does not steal style capacity.
Q: Why does a 150-char prompt work but a 180-char prompt drop descriptors mid-sentence? A: Section tags and special characters add hidden overhead. The 180 may be 220 internally. Strip tags or count with overhead included.
Q: Can I bypass the cap by using image input or reference audio? A: Image / audio reference is a separate channel and does not consume the style cap. Use it for vibe, the style box for technical descriptors.
Q: Does v5 raise the cap further? A: v5 keeps the v4.5 cap (~1000 chars style) but uses the prompt more efficiently — same length, more attributes honored.
Related
- Suno style descriptors ignored
- Suno credit burn fast
- Suno wrong genre
- Suno lyrics ignored
- Suno song too short
Tags: #Suno #Troubleshooting