# Free AI music prompt generator for Suno, Udio and Lyro

> Build a producer-style prompt for Lyro, Suno, Udio or any AI music tool. Pick genre, mood, instruments and vocals, then copy the full brief or a short version.

Source: https://lyromusic.com/ai-music-prompt-generator

# Free AI music prompt generator

Pick a genre, a mood, a few instruments and a vocal, and this tool writes a prompt the way a producer would brief a session: tempo, drums, bass, harmony, lead sounds, vocal character and mix. It runs in your browser, needs no account, and the result works in any text-to-music tool.

Genre

Mood

Energy: Steady

Instruments to feature

Pick up to five.

Vocals

Vocals

Language

Sound

Made for

Tempo (BPM)

Key

## Full brief

## Short version

Under 200 characters, for tools with a small style box.

[Make this track on Lyro$14/mo](https://lyromusic.com/start)

## How to write an AI music prompt that worksSix rules

- **Name the genre and the era** “Early 2000s garage rock” gives a model a sound to aim at; “rock” gives it a category. The music models’ own prompt guides and hundreds of r/SunoAI threads agree on this one.
- **Name instruments, not qualities** “Rhodes, upright bass, brushed drums” are three sounds a model can play. “Sophisticated and elegant” are none.
- **Say who sings and how** Female or male, breathy, raspy, belted, whispered.
- **Four to seven words, all pointing the same way** Fewer and the model fills the gaps with its most generic choices; past about ten it starts ignoring the last ones. “Upbeat” plus “melancholic” makes it do both halfway: say “bittersweet”.
- **Describe the room in words, not numbers** Models do not read numbers such as “30% reverb” or “-6 dB”. Words such as “huge hall reverb”, “deep bass” or “warm tape” are what they follow.
- **Leave artists out** Describe the sound instead of naming a performer. Most tools block names anyway, and the description is what you can reuse.

## Prompts by genre

Eight ready-made prompts for every genre, with tempo, key and instrument notes.

[Open the prompt library](https://lyromusic.com/prompts)

## The style line and the rest, on video4:45

The Entire AI Song Workflow Explained in 300 Seconds [Watch on YouTube](https://www.youtube.com/watch?v=67jkKw6_hQE)

## Questions

### Does this prompt generator use AI?

No. It assembles a prompt from rules written by producers, so it is instant, free and private: nothing you pick leaves your browser. Inside Lyro there is an AI version that writes three takes from a sentence and drafts lyrics in twelve languages.

### Will these prompts work in Suno or Udio?

Yes. They are plain English descriptions of a sound, which is what every text-to-music model reads. If the tool you use has a small style box, copy the short version. For where the prompt goes in Suno and which v6 settings keep it as written, see the [Suno prompt generator](https://lyromusic.com/suno-prompt-generator).

### Why include the BPM and key?

Tempo is the strongest single signal of genre, and a stated key keeps harmony consistent. Some models follow them exactly, others treat them as a strong hint. On Lyro both models treat them as a strong hint, so check the tempo of the result; when a track has to sit on your own vocal or beat, Lyro’s studio tools take the tempo and key from your file.

### Can I put lyrics in the prompt?

Keep them separate. The prompt describes the sound; lyrics go in the lyrics box with section tags such as [Verse] and [Chorus]. Mixing the two makes models sing your instructions.

### How long should a music prompt be?

Four to seven descriptors, under about a hundred words. That is the range r/SunoAI users converge on: past about ten descriptors the last ones get ignored. Put the most important words first.