webMUSHRA v1.4.0

a MUltiple Stimuli with Hidden Reference and Anchor (MUSHRA) compliant web audio API based experiment software.

Listening tests are widely used to assess the quality of audio systems. In the last few years, conducting listening experiments over the Internet, as so called web-based experiments, has become popular. Until now, it was only possible to implement a limited number of listening test types as web-based experiments because web standards were missing some crucial features, e.g. sample manipulation of audio streams. MUSHRA tests are designed to compare the audio quality of several test conditions with intermediate impairments to a high quality reference. With the rise of Web Audio API, for the first time MUSHRA experiments can be carried out within the webbrowser while at the same time being compliant to the ITU-R Recommendation BS.1534 (MUSHRA)

Version 1.4.0

New Features

• Add experiments for spatial attributes, such as ASW, LEV, and localization: #18
• Add Docker support: #21
• Expose version number in user interface: #13
• Added possibility to initialize a new experiment during runtime by calling startup(config): #15

Bug Fixes

• Fix possible sound distortion when reference and stimuli are of different length: #12