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Implementation of multiple synchronous immersive music recordings into a video game engine 24

Implementation of multiple synchronous immersive music recor...

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24th International Congress on Acoustics, ICA 2022

作者： King, Richard Woszczyk, Wieslaw Kelly, Jack Bridgett, Rob D'Oliveira, Brian Rubilar, Rodrigo Graduate Program in Sound Recording McGill University Canada The Centre for Interdisciplinary Research in Music Media and Technology Canada *** United Kingdom La Hacienda Creative Canada Eidos Montreal Canada

Video game sound and music are now at the forefront of newly emerging spatial audio delivery formats for the mass market. Every developer is working toward 3D spatial audio as a default for players using headphones or loudspeakers. Music is one of the last areas in game sound to become truly 'spatialized'. The research demonstrates how music can be experienced in an interactive 3D soundscape. The goal is to create a "proof of concept" demonstration within a game "scene". As the player experiences music within a 3D environment, discrete solutions were adopted where a complete sound field is recorded at multiple locations around a source using stationary high order ambisonic (HOA) microphone arrays. These sound elements can be rotated and moved between points for a total of six degrees of freedom (6DoF). Other sources were implemented using object-based technology combined with a convolution reverb engine using impulse responses that were created from HOA measurements of live spaces. Subjects can navigate through the game scene while experiencing a high-quality immersive/3D audio sound field without the usual artifacts such as level drops and temporal artifacts, for example phase shift or blurring as sources travel between certain locations. © ICA *** rights reserved

关键词： Interactive Experience Spatial Audio Video Games

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Reproducing Virtual Acoustic Environments in the recording Studio: Part 2 155

Reproducing Virtual Acoustic Environments in the Recording S...

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AES New York 2023: 155th Audio Engineering Society Convention

作者： Zhang, Kathleen Ying-Ying Aydin, Aybar Baran, Vlad Kelly, Jack King, Richard Woszczyk, Wieslaw The Graduate Program in Sound Recording McGill University MontrealQCH3A 1E3 Canada The Centre for Interdisciplinary Research in Music Media and Technology MontrealQCH3A 1E3 Canada

ISBN: (纸本)9781942220435

Following objective analysis on the feasibility of representing a virtual acoustic environment in an existing physical space in Part 1 of this paper series, this pilot study asks what perceptual attributes musicians use to interact with acoustic environments, and whether these attributes are important for identifying and interacting with virtual environments as well. Five guitarists are asked to complete an performance task in two performance halls and answer questions regarding their experience with the room acoustics. This process was then repeated in a virtual acoustic representations of the same spaces and the musicians’ responses were evaluated against objective measurements taken in the spaces. The responses to this study show areas where their attribute ratings can or cannot be compared to objective measurements as well as future avenues for developing this methodology. © AES New York 2023. All rights reserved.

关键词： Virtual reality

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The Optimization of Microphone Techniques for capturing Virtual Acoustic Environments 155

The Optimization of Microphone Techniques for capturing Virt...

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AES New York 2023: 155th Audio Engineering Society Convention

作者： Baran, Vlad Zhang, Kathleen Ying-Ying Escobar, Carolina Rodriguez Aydin, Aybar King, Richard Woszczyk, Wieslaw The Graduate Program in Sound Recording McGill University MontrealQCH3A 1E3 Canada The Centre for Interdisciplinary Research in Music Media and Technology MontrealQCH3A 1E3 Canada

ISBN: (纸本)9781942220435

Loudspeaker-based virtual acoustics allow multiple performers to interact with simulated environments that have been recreated within existing physical spaces. When creating these simulations, steps are taken to minimize the impact of the physical room structure on the virtual feedback system. As a result, capturing these spaces in recordings using traditional techniques can lead to unsatisfactory results that do not accurately represent the experience of being present in the room. By contrast, this paper presents a preliminary approach to capturing virtual environments by working with, rather than against the physical environment. Using a high number of spaced capture points, a methodology of realistically capturing a virtual acoustic environment is achieved for playback using immersive media systems. The results of preliminary recordings have shown versatility in capturing the virtual room response in a way that is both musical and realistic. © AES New York 2023. All rights reserved.

关键词： Virtual reality

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On the use of integral input devices and relative mappings for an immersive audio mixing task. Part II 153

On the use of integral input devices and relative mappings f...

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153rd Audio Engineering Society Convention 2022

作者： Quiroz, Diego Martin, Denis The Graduate Program in Sound Recording McGill University MontrealQCH3A 1E3 Canada MontrealQCH3A 1E3 Canada

ISBN: (纸本)9781713870401

Current systems capable of 3D sound reproduction and panning of multi-channel sound sources require the user to employ standard, low-level interaction tools such as knobs and sliders to handle audio sources and reproduction setups with higher complexity. Innovative tools and control methods designed to meet the requirements of immersive audio environments are essential to enable efficient implementation of these technologies and software. This work investigated three types of input devices as controllers for an immersive audio mixing task in a spatial audio system. This second part of the research focuses on the objective data registered by the apparatus of the experiment. Results suggest devices with a high degree of integrality had the fastest learning curve and produced comparable results to the traditional method in response time. © 2022 AES New York 2022 - 153rd Audio Engineering Society Convention 2022. All rights reserved.

关键词： Audio systems

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On the use of integral input devices and relative mappings for an immersive audio mixing task. Part I 152

On the use of integral input devices and relative mappings f...

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AES Europe Spring 2022 - 152nd Audio Engineering Society Convention 2022

作者： Quiroz, Diego Martin, Denis The Graduate Program in Sound Recording McGill University MontrealQCH3A 1E3 Canada MontrealQCH3A 1E3 Canada

ISBN: (纸本)9781713855415

This generation of spatial audio systems are capable of 3D sound reproduction and multi-channel sound sources panning and mixing. Currently, these systems require the user to employ standard, low-level interaction tools such as knobs and sliders to handle audio sources and reproduction setups with higher complexity. Innovative tools and control methods designed to meet the requirements of immersive audio environments are essential to enable efficient implementation of these technologies and software. This work investigated three types of input devices as controllers for an immersive audio mixing task in a spatial audio system. This paper concentrates on the subjective evaluation of the devices while a subsequent paper will focus on the objective data captured by the apparatus of the experiment. Results suggest implementing input devices that match the structure of the task greatly improved participants' sense of motivation and stimulation while completing the trials. © (2022) by the Audio Engineering Society All rights reserved.

关键词： Mixing

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Preliminary evaluation of a sound system employing a cancelling auralizer for producing virtual rooms in a modern recording studio

Preliminary evaluation of a sound system employing a cancell...

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Immersive and 3D Audio: from Architecture to Automotive (I3DA)

作者： Gianluca Grazioli Vlad Baran Kathleen Ying-Ying Zhang Aybar Aydin Wieslaw Woszczyk Graduate Program in Sound Recording McGill University CIRMMT Montréal Canada CIRMMT Faculty of Music McGill University Montréal Canada

We investigate the operation of a virtual acoustic system (VAT) in the Immersive Media Laboratory (IMLAB) at McGill University, and the benefits offered by a real-time cancelling auralizer currently under development at CCRMA of Stanford University and the University of Limerick. The feedback-cancelling system reduces the likelihood of feedback and howling in live real-time auralizations of acoustic spaces through in-room microphone capture and loudspeaker reproduction. Amplified microphone signals are sent to a feedback cancellation network that convolves them with a variety of captured or synthesized multichannel impulse responses, and reproduces them via loudspeakers. One of the research purposes of VAT is to investigate the degree of similarity that can be achieved between the acoustics of a real space and its recreated virtual version. We present a preliminary analysis focused on measuring the main acoustical parameters according to ISO 3382-1 created under different virtual acoustical conditions. Ongoing research examines the interactions of professional musicians with the current state of the system, which will be continuously investigated in the near future. The work is carried out in collaboration with the authors of the feedback-cancelling technology.

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A Perceptual Evaluation of Spatial Room Impulse Responses Convolved with Multichannel Direct sound 153

A Perceptual Evaluation of Spatial Room Impulse Responses Co...

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153rd Audio Engineering Society Convention 2022

作者： Kelly, Jack Woszczyk, Wieslaw King, Richard The Graduate Program in Sound Recording McGill University MontrealQCH3A 1E3 Canada The Centre for Interdisciplinary Research in Music Media and Technology MontrealQCH3A 1E3 Canada

ISBN: (纸本)9781713870401

In a channel-based paradigm, artificial reverberation can be produced by spatial room impulse response (SRIR) convolution. Many receiver positions are measured using multichannel microphone arrays, typically optimized for specific loudspeaker configurations. Each SRIR channel is then convolved with a single monophonic direct sound input to auralize a virtual acoustic environment (VAE). In the following study, an experimental direct sound input treatment is presented where each SRIR channel is convolved with a bespoke direct sound file recorded at a specific angle of incidence with reference to the performer. The result is an SRIR auralization which incorporates the instruments' time-variant radiation characteristics via multichannel direct sound. A subjective evaluation was conducted to assess the perceptual differences between SRIRs with and without the multichannel direct sound treatment. Participants' sense of physical presence, sensory immersion, environment/room width, and naturalness of the sound source were evaluated. Results of three-way within-subject ANOVAs show that the multichannel direct sound convolution treatment significantly improved participants ratings of all attributes under test, and was preferred over the monophonic direct sound treatment. A significant interaction between reverberation treatment and instrument type was observed for environment/room width. The study suggests that this technique can be effective in practice, and more broadly supports the notion that representing a sound-sources' time-variant directivity in artificial reverberation could be a beneficial feature in the design of 3D audio production tools. © 2022 AES New York 2022 - 153rd Audio Engineering Society Convention 2022. All rights reserved.

关键词： Convolution

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Listen to the Theatre! Exploring Florentine Performative Spaces

Listen to the Theatre! Exploring Florentine Performative Spa...

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Immersive and 3D Audio: from Architecture to Automotive (I3DA)

作者： Andrea Gozzi Gianluca Grazioli Dept. of History Archeology Geography Fine and Performing Arts (SAGAS) University of Florence Florence Italy Graduate Program in Sound Recording Schulich School of Music McGill University Montréal Canada

A music performance space constitutes the frame as well as the content of the listeners’ experience. The acoustic environment forces continuous negotiations that differ according to a listener’s role and position as conductor, performer or audience member. The aim of this research is to investigate the acoustics of a performative space, the Teatro del Maggio Musicale Fiorentino in Florence, following two complementary paths, both based on an interactive model. The first one offers an impulse-response experience: the user can virtually explore the opera hall by choosing between the binaural reproductions of 13 different listening positions whether off-site (using an audiovisual web app) or on-site, through bone conduction *** second one is about the aural and visual perception of a rehearsal of the romance "Una furtiva lagrima" from Donizetti’s opera L’elisir d’amore. Through the use of ambisonics recordings, 360 degrees videos and a virtual reality headset, the user can experience the performance from three different points of the theatre alternatively: on stage, in the orchestra pit and in the audience area. The three different perspectives can be switched instantaneously using a remote controller.

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Comparing immersive sound capture techniques optimized for acoustic music recording through binaural reproduction 150

Comparing immersive sound capture techniques optimized for a...

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150th Audio Engineering Society Convention, AES 2021

作者： Howie, Will Martin, Denis Kamekawa, Toru Kelly, Jack King, Richard CBC/Radio-Canada VancouverBC Canada McGill University Graduate Program in Sound Recording MontréalQC Canada Tokyo University of the Arts Department of Musical Creativity and the Environment Tokyo Japan

ISBN: (纸本)9781713830672

A study was undertaken to compare three immersive sound capture techniques optimized for acoustic music recording, within the context of binaural audio reproduction. 3D audio stimuli derived from 9-channel (4+5+0) recordings of a solo piano were binaurally rendered and presented to listeners over headphones. Subjects compared these stimuli in terms of several salient perceptual auditory attributes. Results of the double-blind listening test found no significant differences between two of the sound capture techniques, "spaced" and "nearcoincident," for the perceptual auditory attributes "envelopment," "naturalness of sound scene," and "naturalness of timbre." The spaced technique, however, was shown to create a larger virtual image of the sound source than the near-coincident technique. The coincident technique was found to create an immersive sound scene that occupies a different perceptual space from the other two techniques, delivering less envelopment and naturalness. © 2021 150th Audio Engineering Society Convention, AES 2021. All rights reserved.

关键词： Cell proliferation

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Mapping methods of various input devices and immersive audio environments using polar coordinates for panning. 150

Mapping methods of various input devices and immersive audio...

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150th Audio Engineering Society Convention, AES 2021

作者： Quiroz, Diego Martin, Denis The Graduate Program in Sound Recording McGill University MontrealQCH3A 1E3 Canada MontrealQCH3A 1E3 Canada

ISBN: (纸本)9781713830672

This study explores different mapping implementations for various input devices for an immersive mixing task within a polar coordinate system mixing space. A test, in which subjects were asked to pan a monophonic sound object (probe) to the location of a pink noise burst (target), was conducted in a custom 3D loudspeaker array. The objectives were to determine how quickly and accurate the subjects were able to perform the task using each device, which was most appropriate, and which was most preferred overall. Results show significant differences in response time between devices. Input devices with high level of integrality in and direct mapping to spatial parameters were the most accurate and fastest in trial duration when performing the task. Futures studies will involve a more thorough immersive audio mixing task that allows further detail into the variables investigated. © 2021 150th Audio Engineering Society Convention, AES 2021. All rights reserved.

关键词： Mapping

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