BSD 2-Clause License

Copyright (c) 2011, Jeffrey Chadwick. All rights reserved.
Copyright (c) 2026, Doug L. James / CS 448Z (Stanford University).
                   Python and JavaScript ports, browser demo, test harness.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

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Vendored third-party code:

- fft.js by Fedor Indutny (MIT License). See fft.js for its original
  copyright and license header, which is preserved unmodified.

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Bundled training audio:

The six WAV files under assets/training_audio/ originate from
The Recordist's "Ultimate Fire" sound library
(https://www.therecordist.com/). The original source-code release at
https://www.cs.cornell.edu/projects/Sound/fire/ states: "Permission to
provide a few of these audio clips as examples in our source code
package has been generously granted by The Recordist." This demo
redistributes them as a derivative work of that source-code package
under the same permission, used here unmodified.