led the way, and to Corey Kereliuk for help in programming the Timbre Toolbox. “Analyse acoustique et perception du timbre ,” Master’s thesis (Université du Maine, Lemans, France). This whole project owes a great debt to Jochen Krimphoff whose initial research in Krimphoff (1993) 19. The authors would like to recognize the years of fruitful exchange among colleagues within and between the Music Perception and Cognition team and the Analysis/Synthesis team at Ircam. Project CUIDADO, French PRIAMM Project ECRINS, and French Oseo Project QUAERO grants to Geoffroy Peeters at Ircam, and grants from the Natural Sciences and Engineering Research Council of Canada and the Canada Research Chair program to S.M. This research was supported by European ESPRIT 28793 Project Cuidad, European I.S.T. This analysis suggests ten classes of relatively independent audio descriptors, showing that the Timbre Toolbox is a multidimensional instrument for the measurement of the acoustical structure of complex sound signals. To examine the information redundancy across audio descriptors, correlational analysis followed by hierarchical clustering is performed. Robust descriptive statistics are used to characterize the time-varying descriptors. Some descriptors are global, providing a single value for the whole sound event, whereas others are time-varying. A large number of audio descriptors are then derived from each of these representations to capture temporal, spectral, spectrotemporal, and energetic properties of the sound events. Sound events are first analyzed in terms of various input representations (short-term Fourier transform, harmonic sinusoidal components, an auditory model based on the equivalent rectangular bandwidth concept, the energy envelope). The Timbre Toolbox provides a comprehensive set of descriptors that can be useful in perceptual research, as well as in music information retrieval and machine-learning approaches to content-based retrieval in large sound databases. Other minor bugs and cosmetic issues have been corrected.Įlectroacoustics Toolbox is available for Mac OS X for $499 USD.The analysis of musical signals to extract audio descriptors that can potentially characterize their timbre has been disparate and often too focused on a particular small set of sounds.Cross-correlation functions are properly normalized.Some oscilloscope triggering issues have been corrected.Individual input channel calibration is now possible within the Device I/O Setup window.Product updates can now be automatically retrieved and installed.Memory management and stability have been improved.Transfer function measurements can be corrected by previous captured measurements.Improves compatibility with Snow Leopard (Mac OS X, version 10.6).The software is designed to work with any Mac-compatible audio hardware and supports multiple channels of 8, 16, 24, or 32-bit data with sample rates as high as the hardware will support. ![]() It enables precise measurements of acoustic quantities, such as equivalent and time-weighted sound levels, as well as acoustic and electroacoustic systems, such as listening rooms and loudspeakers. It brings powerful new tools to the Macintosh platform for multi-channel, audio-band data acquisition and real-time analysis of electrical, acoustical, and electroacoustic signals and systems. ![]() Faber Acoustical has released version 2.1 of Electroacoustics Toolbox, a modularized, multi-channel dynamic signal analyzer and data acquisition platform for Mac.
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