# ACE-Step 1.5 AI Music Generator: Exact Tempo and Key | Music Lab | Clip Studio > Make songs that hit an exact tempo, key and time signature with ACE-Step 1.5 in Clip Studio Music Lab. Up to ten minutes, 50+ languages, then split it into stems and mix it. Canonical page: https://clipstudio.ai/ai-music-models/ace-step-1-5 ## Answer ACE-Step 1.5 from ACE Studio writes songs that follow the tempo, key and time signature you set, in more than 50 languages and up to ten minutes long. In Music Lab set them under Advanced in the Session step, and the song opens as a project you can split, mix and master. ## Best for Use ACE-Step 1.5 when the music has to fit something exact: a 120 BPM edit, a song in a singer’s key, a long piece for a stream or a non-English vocal. Pick Mureka 9.5 for a finished-sounding pop song you will keep editing, and Lyria 3.5 for a mood from one sentence. ## Specs - Maker: ACE Studio - Makes: Vocals in 50+ languages, or instrumental - Length: 0:10 – 10:00 - Lyrics: Yours, or written for you - Tempo & key lock: Tempo, key and time signature - Edits after: Stems, then edits on the split tracks ## How to use it in Music Lab ### Describe the song Genre, mood, voice and what it is about. Paste lyrics, or tap Write lyrics for me and edit them. ### Pick a take The song lands in about a minute. Write another take any time and keep the one you like. ### Produce it Split into stems, rewrite a part, mix and master for TikTok, then use it under a video. ## Prompts to try - Convenience store (City pop · Japanese): 80s Japanese city pop, slap bass, glossy synth brass, a late-night convenience store, sung in Japanese, 118 BPM in E flat major - Training montage (Rock · instrumental): A driving rock instrumental for a training montage, live drums and big guitars, 128 BPM in E minor - Slow waltz (Acoustic · 3/4): A slow acoustic waltz in 3/4, nylon guitar and accordion, a quiet vocal about an old dance hall, 84 BPM ## Samples - Head-nod hip-hop beat (Hip-hop), made with ACE-Step 1.5. Prompt: A confident modern hip-hop beat with a head-nodding groove Sound: modern hip-hop, 808 bass, crisp hats. Vocals: instrumental only, no vocals. 90 BPM. Key: C minor. - Late-night house groove (House), made with ACE-Step 1.5. Prompt: A warm, uplifting house groove for a late-night dance floor Sound: house music, four-on-the-floor kick, piano stabs. Vocals: instrumental only, no vocals. 124 BPM. Key: A minor. - Windows Down chorus (Indie pop), made with ACE-Step 1.5. Prompt: The chorus of a sunny indie-pop song about driving to the coast Sound: indie pop, jangly guitars, handclaps, warm bass. Vocals: warm, breathy female lead vocal. 104 BPM. Key: Ab major. ## FAQs ### What is ACE-Step 1.5? ACE-Step 1.5 is an open music generation model from ACE Studio. It writes songs and instrumentals that follow a set tempo, key and time signature. ### Can I set the BPM and key? Yes. Open Advanced in the Session step and set the tempo and key. ACE-Step 1.5 locks them, so the song fits your edit. ### How long can an ACE-Step 1.5 song be? Up to ten minutes. Pick the length in the Session step. ### Which languages does ACE-Step 1.5 sing in? More than 50. Write or paste the lyrics in the language you want. ### How is ACE-Step 1.5 priced in Music Lab? Each song is quoted by its length before you generate and uses your monthly generation allowance. Editing, mixing and mastering are free. ## Related - [Music Lab](https://clipstudio.ai/music-lab.md) - [All music models](https://clipstudio.ai/ai-music-models.md) - [Mureka 9.5](https://clipstudio.ai/ai-music-models/mureka-9-5.md) - [Lyria 3.5](https://clipstudio.ai/ai-music-models/lyria-3-5.md) - [MiniMax Music 3](https://clipstudio.ai/ai-music-models/minimax-music-3.md)