Download Modified Late Reverberation in an Audio Augmented Reality Scenario This paper presents a headphone-based audio augmented reality demonstrator showcasing the effects of manipulated late reverberation in rendering virtual sound sources. The setup is based on a dataset of binaural room impulse responses measured along a 2 m long line, which is used to imitate the reproduction of a pair of loudspeakers. Therefore, listeners can explore the virtual sources by moving back and forth and rotating arbitrarily on this line. The demo allows the user to adjust the late reverberation tail of the auralizations interactively from shorter to longer decay times regarding the baseline decay behavior. Modification of the decay times is based on resynthesizing the late reverberation using frequencydependent shaping of binaural white noise and modal reconstruction. The paper includes descriptions of the frameworks used for this demo and an overview of the required data and processing steps.
Download Perceptual Optimisation of Loudspeaker-Based Reproduction This paper proposes POLAR, a framework for the optimisation of loudspeaker signals using end-to-end differentiable perceptual loss functions. The framework optimises multiple perceptual attributes across multiple listeners, offering a versatile method for a range of problems. This versatility stems from the ability to customise the number of loudspeakers, listeners, and the weighting applied to different perceptual attributes. Here, we apply the method to four problems: (a) source panning for a single listener in stereo reproduction, (b) single-listener colouration matching in stereo reproduction, (c) extended sweet spot using stereo pairs beamforming, and (d) multi-attribute perceptually driven panning in stereo reproduction. The first three problems are evaluated against solutions traditionally used for these tasks: solutions of (a) are shown to be similar to those obtained with tangent panning law and vector-base amplitude panning (VBAP), solutions of (b) are shown to be similar to those obtained for cross-talk cancellation, and solutions of (c) are shown to be similar to those obtained in earlier work on directivity pattern optimisation for sweet spot widening. Each of these solutions was previously obtained using fundamentally different methodologies, demonstrating the flexibility and broad applicability of the proposed framework.