ACE-Step 1.5 Turbo turns a caption and a lyric sheet into a finished song. Describe the style in one line: genre, mood, instruments, production. Script the song with structure tags ([Verse], [Chorus], [Bridge - whispered]), backing vocals in (parentheses), UPPERCASE for belted lines, or a single [Instrumental] tag for vocal-free tracks. BPM, key, and duration are dedicated controls, so captions stay clean. Vocals in 50+ languages, tracks from 10 seconds to 10 minutes, and every generation keeps a lossless WAV original.