spatial9-remix-by-voice

Change a finished Spatial9 immersive mix from plain-language instructions, such as moving instruments in 3D, changing levels, adding motion, effects and acoustic spaces. Use when the user says things like "put the guitar behind me", "make the synth circle in the chorus", "add a cathedral reverb" or "turn the vocal up".

Spatial9 remix by voice

Requires the Spatial9 MCP server at https://spatial9.ai/mcp and the job_id of a finished render.

Steps

1. Read the current mix with get_mix (stems, positions, levels) and get_effects. For song structure, call analyze_song.
2. Translate the request into remix_render changes:

• Position: direction and height, or exact azimuth_deg, elevation_deg and distance.
• Level: gain_db (absolute) or gain_change_db (relative), or mute.
• Motion: motion.shape, one of circle, spiral_up, rise, sink, sweep, fly_over, come_close, move_away, wander or none. Add when (for example chorus), speed and clockwise.

1. Always run remix_render with preview: true first. It is free. Describe what will change and ask the user to confirm.
2. After confirmation, run the same changes without preview and with an idempotency_key.

Effects and spaces

• find_effects with a query (over 1,400 presets). Then apply_effects with action: add and a preset_id, or up to 6 effects with their params.
• find_spaces for rooms, halls and venues. Apply the best match with apply_effects.
• Use target or stem_id to choose which stem, or the master bus, the effect goes on.

Rules

• Keep lead vocal, kick, snare and bass near the front centre unless the user insists otherwise.
• Every movement needs a musical moment. Avoid constant motion; it causes listener fatigue.
• Save a look the user likes with save_mix_template so it can be reused with template_id.

Files

• spatial9-remix-by-voice/SKILL.md

Download every skill as a zip