How to write prompts for Loudly

What does Loudly read?

Loudly's Text to Music reads one prompt box of up to 1,000 characters, with an Optimize button that rewrites it. A track's length is a setting, from 30 to 420 seconds, and it overrides a length written in the prompt. Its VEGA models make instrumentals; MANTA 1 makes a song with a voice, with a Style box, a vocal gender, an instrumental switch and a lyrics box of up to 3,000 characters.

What does Loudly say a prompt should contain?

Loudly's Text to Music page says to name the mood, the genre, the instruments and the scene the music has to sit under, and warns that very short prompts disappoint. It says the mood, genre, instruments and structure all come out of the words, and its own examples are a sentence or two.

How does APMonster write a Loudly prompt?

APMonster writes Loudly's prompt as up to two sentences, written as a listening experience: the genre, the energy, the tempo ("N BPM" when there is one) and the production's texture, followed by a sentence for the song's arc. It stays under 1,000 characters, the limit of Loudly's prompt box.

Text to Music has no tempo or energy setting, so both go in the words. Create, Analyze and Reimagine write for Loudly's instrumental VEGA models, and so does LyrAssist's Loudly target, which writes a vocal guide for a singer to record over the track.

How does APMonster write for MANTA 1?

MANTA 1 sings, and LyrAssist has a target for it, Loudly MANTA 1. It writes sung lyrics for MANTA 1's lyrics box, held under 3,000 characters. Loudly documents no lyric format, so the lyrics use plain section labels on their own lines, such as [Verse 1] and [Chorus]: the common practice, not a Loudly rule.

Make music prompt then writes MANTA 1's Style box, under 1,000 characters, with the voice described in words, and the panel lists the boxes to paste in the order Loudly's form shows them, with the Vocal Gender to set and a reminder to leave Instrumental off.

How do you tell Loudly what to avoid?

Loudly has no negative prompt, so describe what you want instead. APMonster turns things to avoid into what they leave room for: no heavy distortion becomes a clean mix, and no trap hi-hats becomes a soft drum machine.

How does Loudly take song structure?

Text to Music's prompt takes no section tags. APMonster describes the song's arc in a sentence in the prompt and gives the length to set, from 30 to 420 seconds.

Opens with a soft instrumental intro, builds into a steady verse, surges into a strong chorus, drops to a steady verse, surges into a strong chorus, drops to a soft bridge, surges into a full-force chorus, and ends on a very soft instrumental outro.

This sentence goes into the prompt, and the length setting is the song's length, 2:47.

How do you release a Loudly track?

Loudly says its tracks reach Spotify, Apple Music and the other stores only through Loudly's own Releases: not by uploading them yourself, and not through another distributor. Its page says to take a track through Loudly's mastering first if it is meant for release.

APMonster's release pack says so for a song written for Loudly, on the release screen and in the pack itself.

One brief, written for Loudly

Every guide on this site writes the same song for its platform. This is the shape APMonster asks for on Loudly; the wording of a generated prompt varies from one generation to the next.

Wistful dream pop at 92 BPM with a late-1980s shimmer and a gently building energy. Chorus-soaked guitar and warm analog synth pads float over a soft drum machine and round bass in a clean, airy mix.

Opens with a soft instrumental intro, builds into a steady verse, surges into a strong chorus, drops to a steady verse, surges into a strong chorus, drops to a soft bridge, surges into a full-force chorus, and ends on a very soft instrumental outro.

2:47

Sources

• Loudly, Text to Music, read 4 October 2026
• Loudly for developers, API reference, read 4 October 2026
• Loudly, FAQ, read 4 October 2026
• Loudly API reference, POST /api/ai/manta/songs, read 4 October 2026