Beat-synced soundtrack kit by Scenario — guide skill for voice & voiceover

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Music at an exact BPM and a 12-sound SFX kit from Scenario MCP, a beat-grid fit, and a -14 LUFS mix on the beat.

What it does

Part of Scenario's Kinetic Film skill (https://www.scenario.com/explorations/kinetic-film/): the sound half of a kinetic launch film. Through Scenario MCP it picks a music model with a tempo input (recommend, model_schema_get, a priced dry run), generates two instrumental takes at the film's exact BPM, and generates a kit of one-shot sounds (whooshes, impacts, a big impact, hit, slash, key clicks, pop, tick, riser, glitch, logo hit) plus custom sounds for the film's own joke. beat_grid.py measures each take (tempo, first strong downbeat, downbeats, drop candidates with their rise, grid strength) so you choose the offset that lands the drop on the planned beat. mix.py places every cue from the film's own cue list, aligned on each sound's attack, ducks the music under big hits, cuts the music dead on the logo beat, masters to -14 LUFS / -1 dBTP in two passes, and lists any hit quieter than the music.

Use when

Not for

Install

Example output

https://s3.varg.ai/files/4325c578-378d-4c43-ae53-3cc3218df1ea/file_acb97730770a.mp4 — "Just code" with its soundtrack drawn under the picture: the envelope of the real mix and the 174 BPM beat grid scrolling past the playhead (beats 66-77 and 133-143). (credit: Scenario, "Just code" (Kinetic Film); waveform and beat-grid overlay drawn by varg, https://www.scenario.com/explorations/kinetic-film/)

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