# Lab 3: Your First Immersive Mix From Your Own Stems, Exported to Binaural

> Prepare your own stems, write a creative brief, let GravityLLM place them in 3D, refine by ear and export your first immersive mix as binaural.

Web page: https://spatial9.ai/blog/academy-lab-first-immersive-mix
Author: Spatial9 Team
Published: 2026-10-04. Updated: 2026-10-04.

## Key takeaways
- The Spatial9 Student plan costs $9 a month and includes unlimited Immersive Classroom projects with binaural and 5.1 exports.
- Every stem should be exported from the same start and end point with one shared sample rate and bit depth, such as 48 kHz and 24-bit.
- Write a one-paragraph creative brief naming genre, mood, listener position and focus before uploading, so the AI result can be judged against intent.
- Change only one thing per revision, then test the final binaural export on at least three devices, including at least one pair of earbuds.

In this lesson: You will take your own music from stems to a finished binaural file. You will prepare stems like a professional, write a one-paragraph creative brief, upload in "Your Stems + AI", review and refine by ear using the Lab 1 protocol, export your mix as binaural, and test it on several headphones.

This is the moment the course has been building toward. Until now you have listened to someone else's music in someone else's space. Today the music is yours.

Somewhere on your drive there is a track you care about. A beat you made at two in the morning. A band recording from last semester. A score cue for a friend's short film. By the end of this lab, that music will live all around the listener, and you will have a file you can send to anyone with a pair of headphones.

You already have everything you need. Lab 1 gave you a listening method. Lab 2 showed you that space is something you can shape. Now you bring your own stems, GravityLLM proposes a spatial arrangement, and you do what professionals do: brief, judge, listen, revise and approve.


## What you will learn

- How to prepare stems so an AI spatial engine can work with them cleanly.
- How to write a one-paragraph creative brief that guides your decisions.
- How to upload in "Your Stems + AI" and review the result in the stage player.
- How to iterate with purpose and export your mix as binaural.
- How to test on several headphones and earbuds and document your decisions for a portfolio.

The rest of this lesson is free with a Spatial9 account: https://spatial9.ai/blog/academy-lab-first-immersive-mix