Prompt Mureka for music

Last updated: October 12, 2026

Mureka writes full-length music from a description: vocal songs with Mureka 9.5 Song, and vocal-free themes and beds with Mureka 9.5 Instrumental. Pick it when you need a whole track (a title theme, a tavern song, a town loop) rather than a short sting.

Let the agent write it

You don't have to write any of this yourself. The Layer agent knows how to prompt each model it runs, from the same guidance this page is built on. Name the model and describe the job, for example: With Mureka 9.5 Instrumental, make a hopeful orchestral title theme for our fantasy RPG, French horn lead, march feel. For a song with your own words, paste the lyrics into the brief and name Mureka 9.5 Song: the agent sends them to Mureka as lyrics, separate from the style, so the song is only as long as your words. The agent writes the prompt, shows you its plan, and runs it when you approve. Use the rest of this guide when you want to write or adjust the prompt yourself, and see Write a brief for the agent for how to brief it.

When to use it

Use Mureka for complete pieces of game music: menu and title themes, town and tavern tracks, credits songs, trailer songs with vocals, and background beds that run for minutes. It arranges a whole track with an opening, a build and an ending.

It is not the tool for a cue of a set length. Mureka decides how long the track runs, and there is no length control, so a 20-second stinger means trimming a longer track. For sound effects and short UI sounds, use Create sound effects instead. To compare other music models, see Create music.

Versions on Layer

Mureka 9.5 Song

A finished song with vocals. Give it a description and it writes the lyrics itself, on the topic and in the language you name; or give it your own lyrics and it sings them, with the description steering the style. Prompts run up to 2,000 characters.

Mureka 9.5 Instrumental

Music with no vocals, for anything that sits under gameplay or dialogue. In our tests, speech recognition found no sung words in any instrumental track. Prompts run up to 1,024 characters, so keep the brief tight.

How to write the prompt

Genre, emotion, rhythmic feel and tempo, vocals (Song only), instruments with their roles, how the sections build, the mix, then what the track is for:

Orchestral fantasy adventure, warm and hopeful with a hint of wonder, steady march feel at 90 BPM, solo French horn carries the main theme, pizzicato strings drive the rhythm, harp arpeggios and light snare fill the gaps, soft opening that builds into a full heroic restatement of the theme, then settles back down, warm hall reverb and a clean cinematic mix. Title-screen music for a fantasy RPG.

Mureka's own guide ranks the parts in this order: genre and emotion set the track's identity, and the instruments, structure and mix refine it. When the brief has to be short, as it does within the Instrumental model's 1,024 characters, cut from the end. That prompt is the one in the clip above.

What works

Lyrics after the description

The Create music form has one text box, so to have Mureka 9.5 Song sing your words, write the style first, then Lyrics: and the lyrics, with each section tag on its own line:

Rowdy medieval tavern folk song, warm and cheerful, bouncy 6/8 jig, male lead vocal with a gang chorus joining on the refrain, fiddle carries the melody, acoustic guitar strums, hand drum and stomping feet keep time, short verse that lifts into a big singalong chorus, close and lively room sound. Tavern music for a fantasy RPG.

Lyrics:
[Verse]
Lanterns low in the Gilded Boar
Boots are muddy, the road was long
Set your sword down by the door
Raise a cup and join the song
[Chorus]
Ho, the road goes on tomorrow
Ho, tonight we drink and stay
Leave your coin and leave your sorrow
Sing until the break of day

We checked the result with speech recognition: Mureka sang the lines as written and did not sing the tags, but it ran the song out to 2 minutes 40 seconds, bringing the chorus back at the end. The same lyrics sent through the agent as a separate lyrics input came back as a 52-second song that ended on the chorus. Use the agent when the song must be exactly your words and no longer.

Let Mureka write the lyrics

Leave out lyrics and Mureka 9.5 Song writes its own. Name the language and the topic in the prompt: "English lyrics about weary travellers resting at an inn". In our test it wrote verses about a cold road and a glowing inn window, and a chorus about ale and bread by the fire that came back three times.

Emotion as musical action

Write what the music does, not how it should feel: "restrained verse that opens into a spacious chorus", "soft opening that builds into a full heroic restatement, then settles". Adjectives such as "sad", "beautiful" or "professional" give Mureka nothing to act on.

Instruments with roles

Name two to four instruments and say what each does: "solo French horn carries the main theme, pizzicato strings drive the rhythm, harp arpeggios fill the gaps". A role tells Mureka what leads and what supports; "full band" leaves it to guess.

Sections as energy changes

Describe the arc by how dense each part is: "sparse verse, gradual lift, wide chorus, stripped bridge". Asking for every section to be big removes the contrast that makes a chorus land.

A few exclusions, at the end

Mureka has no negative prompt. Add one to three targeted constraints at the end, such as "no spoken intro, no abrupt genre change". A long list of things to avoid dilutes the rest of the brief.

One change at a time

When a track is close, change one thing in the prompt and run it again, and keep both to compare. Change several at once and you cannot tell which one made the difference.

What to avoid

Asking for a length in the prompt

Mureka decides how long the track runs. We added "A short 30-second cue ... Keep it to 30 seconds" to the title-theme prompt and got a 3 minute 39 second track, longer than the 2 minute 33 second one without it. Generate the full track and trim it in an audio editor, or use the agent with your own lyrics, which keeps a song to the length of its words.

Relying on a BPM number alone

A tempo in the prompt is a nudge, not a setting. We measured two runs asking for 90 and 150 BPM; only the 150 run came out near its number. Pair the number with a feel word Mureka can act on: "steady march feel at 90 BPM", "driving gallop at 150 BPM".

Vocal direction for Mureka 9.5 Instrumental

Mureka 9.5 Instrumental has no vocals, so words about a singer spend its shorter prompt for nothing. When a track must stay free of vocals, choose the Instrumental model.

Settings that matter

Mureka's form is the prompt: there is no Duration control and no lyrics field, so the structure and the words come from what you write, and Mureka sets the length. Prompt language tells Mureka which language the prompt is written in. To pick between a song and an instrumental, pick the model.

Prompts to start from

Title-screen theme

Mureka 9.5 Instrumental.

Orchestral fantasy adventure, warm and hopeful with a hint of wonder, steady march feel at 90 BPM, solo French horn carries the main theme, pizzicato strings drive the rhythm, harp arpeggios and light snare fill the gaps, soft opening that builds into a full heroic restatement of the theme, then settles back down, warm hall reverb and a clean cinematic mix. Title-screen music for a fantasy RPG.

Tavern song, lyrics written by Mureka

Mureka 9.5 Song.

Rowdy medieval tavern folk song, warm and cheerful, bouncy 6/8 jig, male lead vocal with a gang chorus joining on the refrain, fiddle carries the melody, acoustic guitar strums, hand drum and stomping feet keep time, short verse that lifts into a big singalong chorus, close and lively room sound. English lyrics about weary travellers resting at an inn. Tavern music for a fantasy RPG.

Tavern song with your own lyrics