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Augmenting Room Acoustics and System Interaction for Intentional Control of Audio Feedback

This paper presents the interactive enhancement of audio feedback through context-based control, leading to the generation of desired sonic behaviors by augmenting the effects of physical space in the feedback sound. Our prototype maps approximations of room reverberation to tempo-scale characteristics of the audio feedback. These characteristics are generated by a combination of adaptive amplification control and a digital variable delay line in the feedback loop. Room reverberation is inferred from the feedback sound by real-time cross-correlation of input with output signals, which is used to guide the variable delay line. This variation, coupled with an adaptive gain control, determines room-dependent tempo effects.