
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 2 lines. Neither model returns per-line timings and there is no forced aligner here, so the highlight follows the playhead approximately.
indie folk, fingerpicked acoustic guitar, brushed snare, quiet swelling strings, close intimate female vocal with a second harmony voice, minor key, 76 BPM
'A second harmony voice' gets two-part harmony from a model with no per-voice controls by describing the arrangement. Co-op Forever does the same with 'trading lines' for alternation.
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.