Add Instruments to a Song with AI
How can I add an instrument to a song I already have, for free?
Upload the song or pick it from your RaoMusic library, type an instrument such as "acoustic drums" or "warm strings", and generate. AI writes a part to fit the song's tempo and key and layers it on top, so the original recording stays as it is. Each run costs 20 credits and gives two versions, and free accounts get 50 credits a month. You can turn the new instrument up or down afterwards, or download it as a separate track.
No subscription required
Works on the free plan, MP3 download included. 50 free credits every month.
Commercial use included
Songs made on RaoMusic can be used commercially, even on the free plan.
One more instrument, nothing else changed
AI vs Suno Studio vs recording it yourself
All three leave your original alone. The difference is what it costs and what you need to know.
| Feature | RaoMusic | Suno Studio (Add Stem) | Record it yourself |
|---|---|---|---|
| Cost | 20 credits per run; free plan available | Premier plan | Software, instruments or a session player |
| What you need | Describe the instrument in words | A song on Suno and the Suno Studio editor | Playing, recording and mixing skills |
| Time | A minute or two | About the same | Hours to days |
| Separate instrument track | Yes: MP3 free, WAV for subscribers | Yes | Yes |
| Which songs | Songs from any model on RaoMusic, or your uploads | Songs in your Suno library, including uploads | Any recording |
Cost
- RaoMusic:20 credits per run; free plan available
- Suno Studio (Add Stem):Premier plan
- Record it yourself:Software, instruments or a session player
What you need
- RaoMusic:Describe the instrument in words
- Suno Studio (Add Stem):A song on Suno and the Suno Studio editor
- Record it yourself:Playing, recording and mixing skills
Time
- RaoMusic:A minute or two
- Suno Studio (Add Stem):About the same
- Record it yourself:Hours to days
Separate instrument track
- RaoMusic:Yes: MP3 free, WAV for subscribers
- Suno Studio (Add Stem):Yes
- Record it yourself:Yes
Which songs
- RaoMusic:Songs from any model on RaoMusic, or your uploads
- Suno Studio (Add Stem):Songs in your Suno library, including uploads
- Record it yourself:Any recording
How to add an instrument to a song
Three steps, and the original song is never changed.
- 1
Pick or upload a song
Sign in, then choose a song from your library or upload an MP3 or WAV.
- 2
Type the instrument
Write what you want, such as "banjo" or "warm strings in the chorus", or tap one of the common instruments.
- 3
Listen and adjust
Two mixed versions appear in your library in a minute or two. Open Adjust mix to change the volume, or download the instrument on its own.
When to add an instrument with AI
Use it when a song already works and you want one more part. Use a cover or a new generation when you want a different arrangement.
Best for
- ✓Adding drums, bass or strings to a sparse song
- ✓Trying a sax, guitar or violin line before you record one
- ✓Producers who want the new part as a separate track
Not for
- !Folk and rare instruments (they often don't come out right)
- !Songs you don't have the rights to
- !Changing the vocals or the whole arrangement (try a cover)
How AI adds an instrument without touching your song
When you add an instrument, AI listens to the whole song and writes a new part for it, such as a drum groove or a string line written to fit the song's tempo and key. That part is generated as its own track. Your original audio isn't regenerated or edited; the new track is mixed on top of it.
By default the new instrument is a little quieter than the original (about 6 dB), so it supports the song instead of covering the vocal. If you want it louder or quieter, open Adjust mix: you can preview any balance for free and save the one you like as a new song for 2 credits. The instrument track is also in the Download menu, MP3 for free and WAV for subscribers, if you'd rather mix it yourself.
Common instruments give the most reliable results: drums, bass, electric and acoustic guitar, piano, strings, saxophone, trumpet, violin, synth pads, banjo and bagpipes. Folk and rare instruments often come out as something else. Writing where the part should play helps too, for example "soft piano only in the verses". To add more than one instrument, run it again on the new song.
Add instruments to a song FAQ
Each run costs 20 credits and gives you two versions. Free accounts get 50 credits every month. Saving a different volume as a new song costs 2 credits, and the instrument track's WAV costs 4 credits for subscribers. If a run fails, the credits are refunded.
No. The original audio isn't regenerated or edited. AI creates the new instrument as a separate track and mixes it on top, and your original song stays in your library as it was.
Common instruments: drums, bass, electric and acoustic guitar, piano, strings, saxophone, trumpet, violin, synth pads, banjo and bagpipes. Folk and rare instruments, such as the erhu, often don't come out right.
Yes. Open Adjust mix on the new song to move the original and the instrument up or down and hear the result right away, for free. When you like it, save it as a new song for 2 credits.
Yes. In the song's Download menu, choose the instrument track. The MP3 is free; the WAV is for subscribers and costs 4 credits the first time.
Any song in your RaoMusic library, whichever model made it, or a song you upload as an MP3 or WAV. Sound effects can't be used. Songs up to about 8 minutes work.
Yes, including on the free plan, if the original song was made on RaoMusic or is your own original recording that you uploaded. For a recording someone else owns, you need the rights to it, and we don't issue a license certificate for it.
Uploads that match a released song or fail the content check are rejected, and the credits are refunded. Use songs you made or have the rights to.
Yes. Each run adds one part. Run it again on the new song to add another, for example drums first and then strings.
On Suno, adding a stem is part of Suno Studio on the Premier plan and works on songs in your Suno library. On RaoMusic it works on the free plan with credits, and on songs from any model or your own uploads.
No. It only adds a new part on top and doesn't remove anything. To take an instrument out, use the Stem Splitter.
Related tools
Add an instrument to your song
Pick a song or upload one, type the instrument, and get two mixed versions. Sign in to get started.