JUCE UI component for a MUltiple Stimulus Hidden Anchor (MUSHRA) style perceptual evaluation [1] in C++.

Randomises the order in which audio scenes (i.e. source materials) are presented, and the association between slider number and stimulus for each scene.

Consists of:

• MushraComponent: UI component that controls which stimulus is playing, and records the results at the end of session
• MushraProcessor: Maintains the scene order, which scene is currently loaded, and which stimulus is playing ,

Installation

1. Clone repo.
2. Open Projucer VST project.
3. Drag cloned folder projucer file explorer
4. Add cloned folder path to Exporters > Xcode > Debug/Release > Header Search Paths
5. Include processor in AudioProcessor source: #include <MushraProcessor.h>
6. Include ui component in AudioProcessorEditor source: #include <MushraComponent.h>

Usage

MushraComponent

Treat the MushraComponent like any other JUCE UI component.

The constructor takes 3 parameters:

1. The AudioProcessor
2. number of sliders to display, equivalent to the number of stimuli under test.
3. the directory in which to save the results

MushraProcessor

The AudioProcessor inherits from this class.

Takes two constructor parameters:

1. Number of stimuli under test.
2. Number of different audio scenes/source materials that the stimuli are derived from

The AudioProcessor decides what audio to play based on the properties:

int selectedStimulus
int currentScene

Which are controlled by changes to the MushraComponent.

References

[1] Method for the subjective assessment of intermediate quality level of audio systems (ITU-R BS.1534-3)

Licence

This software uses the JUCE C++ framework, which is under GPL license. More information: https://github.com/WeAreROLI/JUCE