This engineering brief describes HULTI-GEN (Huddersfield Universal Listening Test Interface Generator), a Cycling ‘74 Max-based tool. HULTI-GEN is a user-customizable environment that takes user-defined parameters (e.g., the number of trials, stimuli, and scale settings) and automatically constructs an interface for comparing auditory stimuli, while also randomizing the stimuli and trial order. To assist the user, templates based on ITU-R recommended methods have been included. As the recommended methods are often adjusted for different test requirements, HULTI-GEN also supports flexible editing of these presets. Furthermore, some existing techniques have been summarized within this brief, including their restrictions and how they might be altered through using HULTI-GEN. A finalized version of HULTI-GEN is to be made freely available online at: http://www.hud.ac.uk/research/researchcentres/mtprg/projects/apl/
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