Spatial Standards — reference implementation of the On Stage Spatial Standard
and the Front Row Spatial Standard.

Copyright 2026 Clearbay AI

Licensed under the Apache License, Version 2.0. See LICENSE.

THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND. See the
LICENSE for the full disclaimer of warranty and limitation of liability.

INPUT RIGHTS. This software processes audio supplied by the user — local
files or URLs. By processing any file or URL you affirm that you own, or
otherwise have the legal right to use and process, that content. The authors
host no content, provide no catalogs, and ship no audio. Responsibility for
the lawfulness of input material rests entirely with the user.

THIRD-PARTY COMPONENTS. This software depends on, but does not bundle or
redistribute, the following. Each remains under its own license and terms;
install them separately.

Python packages:
  - anthropic (MIT License) — optional; the Anthropic API client used by the
    Natural Perspective control layer. Installed only with the [natural] extra.
    The base install has no required third-party Python packages.

External commands (found on PATH; never bundled or redistributed):
  - FFmpeg (LGPL/GPL depending on build) — audio/video processing. Required.
  - Demucs (MIT License) — source-separation models, downloaded on first run
    from their original host.
  - audio-separator (MIT License, by Andrew Beveridge) — runs the crowd-
    separation pass; required for Natural Perspective and the Front Row
    template.
  - yt-dlp (Unlicense / public domain) — used only for URL inputs.

Models (downloaded on first run from their original hosts, not bundled):
  - Demucs htdemucs_6s weights (see Demucs, above).
  - Mel-Band RoFormer crowd-separation checkpoint, by the community authors
    aufr33 and viperx (the "Mel-Band RoFormer" architecture). The checkpoint
    is loaded via audio-separator. Its redistribution terms are the model
    authors' own; verify them for your use.

Other:
  - "Inter" typeface (SIL Open Font License 1.1) — referenced by name for the
    UI/report; not bundled. The interface falls back to a system sans-serif
    when Inter is not installed.

NO AFFILIATION. References to media-server, hardware, or platform brands in
documentation are descriptive only and imply no affiliation, sponsorship, or
endorsement.
