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Real-Time Auralization Employing a Not-Linear, Not-Time-Invariant Convolver

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The paper reports the first results of listening tests performed with a new software tool, capable of not-linear convolution (employing the Diagonal Volterra Kernel approach) and of time-variation (employing efficient morphing among a number of kernels). The listening tests were done in a special listening room, employing a menu-driven playback system, capable of presenting blindly sound samples recorded from real-world devices and samples simulated employing the new software tool, and, for comparison, samples obtained by traditional linear, time-invariant convolution. The listener fills up a questionnaire for each sound sample, being able to switch them back and forth for better comparing. The results show that this new device-emulation tool provides much better results than already-existing convolution plugins (which only emulate the linear, time-invariant behavior), requiring little computational load and causing short latency and prompt reaction to user’s action.

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AES - Audio Engineering Society