Tucked next to the length picker in the composer is a small menu with two options, Auto and Guided. It decides how literally Chillframe reads the music half of your brief, and picking the right one saves you re-rolls.
Auto is the default, and it works like a film composer reading a script. The look of your scene stays in the picture; the music only picks up what you could hear or feel standing there. Write "a rainy Tokyo alley with neon signs" and the neon goes to the visuals, while the rain and the late-night mood go to the score. Everything you didn't mention, tempo, arrangement, key, gets chosen for you, in keeping with the genre.
Pick Auto when you know the vibe but not the tracklist.
Guided flips it. The director only arranges what you actually asked for: your instruments, your tempo, your key, nothing invented on top. "Slow nylon guitar over soft rain, 70 BPM, no drums" comes back exactly that way. Leave the audio unspecified and the music leans on your scene and genre instead of guessing.
Pick Guided when you can already hear the track in your head.
Your genre is law, from lofi to metal.
"No drums" means no drums.
The album holds together: one tempo, one key, and a lead that changes from track to track so an hour never blurs into one song.
And if one track misses, you don't have to regenerate the video. A single track re-rolls for 1 credit; see Re-roll music, visuals or the thumbnail. Or email [email protected] and a human will read it.