The SRMR toolbox is licensed under the MIT license. 

> Copyright (c) 2014 João F. Santos, Tiago H. Falk
> 
> Permission is hereby granted, free of charge, to any person obtaining a copy
> of this software and associated documentation files (the "Software"), to deal
> in the Software without restriction, including without limitation the rights
> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> copies of the Software, and to permit persons to whom the Software is
> furnished to do so, subject to the following conditions:
> 
> The above copyright notice and this permission notice shall be included in all
> copies or substantial portions of the Software.
> 
> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> SOFTWARE.

The toolbox includes the following external toolboxes as well as code derived from
these toolboxes in the `libs` folder. These external toolboxes are under their
own licenses and are distributed with the SRMR toolbox for convenience of the users.

- [Auditory Toolbox](https://engineering.purdue.edu/~malcolm/interval/1998-010/) (copyright: Malcolm Slaney, 1998)

- [Gammatone-like spectrograms](http://www.ee.columbia.edu/ln/rosa/matlab/gammatonegram/) (copyright: D. P. W. Ellis, 2009)

- The ITU-T speech voltmeter in the `libs/PreProc/asl_meter.m` was provided by Lu Huo (LNS/CAU, December, 2005, Kiel).
