
A sung track: the prompt below set the arrangement and the script is what the model was given to sing. Copy the prompt, change a word and render your own.
What ACE-Step was given to sing, verbatim. Press play and it follows along.
Line positions are the rendered length divided by 4 lines. Neither model returns per-line timings and there is no forced aligner here, so the highlight follows the playhead approximately.
triumphant power pop victory anthem, bright electric guitars, punchy live drums, gang vocal chorus, major key, 140 BPM
Short repeated lines fit a 20-second render. Give ACE-Step a dense verse and it rushes the syllables or drops half of them.
Listed as Apache 2.0 in the catalogue and flagged unverified there. Read the model card before shipping output commercially. Soundbox itself is MIT and imposes no terms of its own on what you generate.