1.  **Download** the `blender_midi_gen_advanced.py` script.

2.  **Open Blender** (4.0+ recommended for best results).

3.  Go to **Edit > Preferences > Add-ons**.

4.  Click **Install...** and select the `.py` file.

5.  **Enable** the add-on by checking the box next to "Animation: MIDI Music Visualizer".

6.  The tool will appear in the **3D Viewport Sidebar (N-Panel)** under the **MusicGen** tab.

> **Note:** This add-on requires the `mido` library. It will attempt to install it automatically the first time you run a generation. If it fails, please run Blender as Administrator/Root once.