Sonauto AI · Free AI Song Generator

Turn Ideas or Lyrics into Two Complete Song Versions

Start free. Get two full versions in one generation, compare the melody, vocals, and arrangement, then choose one to develop.

Hear the range

Start with a sound worth following

4 real inputs8 playable songsGenerated July 30, 2026

01Original lyricsV4.5 · Custom Mode · Vocal
Picked A · Compare input and selection
02Story briefV4.5 · Simple Mode · Vocal
Picked A · Compare input and selection
03Instrumental briefV4.5 · Custom Mode
Picked A · Compare input and selection
04Structure constraintsV5 · Custom Mode · Vocal
Picked B · Compare input and selection

Create your version

One studio, three ways in

Bring the part of the song you already have

Begin with an idea, your own lyrics, or a clear instrumental direction. Every path leads to the same goal: a complete song you can play and shape.

Idea to Song

Describe the feeling, story, or moment

Describe the subject, emotional turn, musical character, and vocal perspective. Sonauto AI develops that brief into lyrics, melody, vocals, and instrumentation, so use this path when the concept matters more than exact wording.

Best when: You have a story, mood, title, theme, or visual scene but no fixed lyric draft.
Example input: “Cinematic indie-pop about leaving a hometown before sunrise; intimate female vocal, restrained verses, and an open final chorus.”
Check first: Does the hook express the central idea, and does the verse-to-chorus energy follow the story?

Write from an idea

Lyrics to Song

Let your words lead the arrangement

Paste the lyric lines you want the vocal to follow, keep verse and chorus labels visible, and describe the sound separately. This path gives your wording priority while the model interprets phrasing, melody, voice, and arrangement.

Best when: Your verse, chorus, hook, or full lyric draft should remain recognizable in the result.
Example direction: “Warm acoustic soul, close male vocal, unhurried verses, fuller harmony in the chorus, and a short piano outro.”
Check first: Listen for pronunciation, crowded lines, section breaks, and whether the chorus receives enough contrast.

Use your lyrics Draft lyrics first

Instrumental Music

Build a full track without a lead vocal

Choose instrumental and describe the musical role, arc, palette, pace, and ending. Do not add lyric lines unless you want vocal content; the useful detail is how the track should function and develop.

Best when: You need background music, a score-like cue, a writing bed, or a track with no lead vocal.
Example input: “Nocturnal lo-fi instrumental for a quiet study scene; brushed drums, muted electric piano, soft bass, no lead vocal, and a resolved ending.”
Check first: Confirm there is no lead vocal, then compare structure, energy changes, instrument balance, and the ending.

Create an instrumental Compare models

Prompt or lyrics to a full song, in three moves

1
Describe what should stay recognizable
Name the lyric, scene, story, mood, or sound at the center of the song. A few concrete details give the model a clearer task than a list of broad adjectives.
2
Choose vocals, lyrics, and musical direction
Choose a vocal song or instrumental, then guide the genre, instruments, pace, energy, and voice. Use Custom Mode when exact lyric lines need to remain in the song.
3
Keep what works, then change one variable
Listen for the melody, phrasing, rhythm, or arrangement worth keeping. If neither take lands, revise one instruction instead of replacing the whole brief.

From first listen to the version you keep

Generate, compare, and continue without leaving the creative flow.

Two takes from one brief

Both results begin with the same prompt, lyrics, style, and model. The differences come from interpretation, giving you a concrete basis for the next edit.

Write a song

Complete songs, ready to revisit

Hear a developed vocal, melody, and arrangement rather than a disconnected sketch, then return to the version that has the strongest idea.

Hear song examples

MP3 and WAV on paid plans

Paid plans include MP3 and WAV downloads. Commercial usage is a separate license question and applies only to eligible annual-plan generations.

Compare plans

Questions about the AI song generator

What is an AI song generator?

An AI song generator—sometimes called an AI song writer—turns written musical direction into audio. With Sonauto AI, you provide a prompt or lyrics plus the mood and style, and the generator creates two complete song versions with melody, vocals, and instrumentation for you to compare.

Can AI turn my lyrics into a complete song?

Yes. Paste your lyric draft into Custom Mode, keep the section labels visible, and describe the sound separately. Sonauto AI will sing those words with melody and accompaniment; you can then revise a lyric or change one musical instruction.

Can I create instrumental music without vocals?

Yes. Turn on Instrumental, then describe the genre, mood, instruments, pace, structure, and ending you want. Sonauto AI will create a complete track without a lead vocal, which works well for background music, writing beds, and score-like cues.

Does one generation create one song or two?

One generation creates two versions of a complete song from the same prompt, lyrics, and style direction. Compare their melody, voice, pacing, and arrangement before choosing which result to keep or develop.

Is the Sonauto AI song generator free?

Yes. The Free Plan starts after sign-in. Free songs are public by default and available for online listening. Downloads, private generations, and commercial usage rights depend on the paid plan and current license terms.

Can I download and use a Sonauto AI song commercially?

Paid plans include MP3 and WAV downloads, but downloads and commercial rights are different. Only eligible annual Starter and Plus generations receive the royalty-free commercial grant described in the License Agreement; Free and monthly-plan results do not.

The next version starts with one line

Choose the idea, lyric, or sound you want to hear—and make it playable.

Create a song Draft lyrics first