Real Time Spectral Analysis

Digital Real-Time Spectral Analysis

Real-time Fft Algorithm Applied to On-line Spectral Analysis*

On-Iine running spectral analysis is of considerable interest in many electrophysiological signals, such as the EEG (electroencephalograph). This paper presents a new method of implementing the fast Fourier transform (PTT) algorithm. Our "real-time FFT algorithm" efficiently utilizes computer time to perform the FFT computation while data acquisition proceeds so that local butterfly modules are...

The Sign-Real Spectral Radius for Real Tensors

In this paper a new quantity for real tensors, the sign-real spectral radius, is defined and investigated. Various characterizations, bounds and some properties are derived. In certain aspects our quantity shows similar behavior to the spectral radius of a nonnegative tensor. In fact, we generalize the Perron Frobenius theorem for nonnegative tensors to the class of real tensors.

Real-time Spectral Attenuation Based Analysis and Resynthesis, Spectral Modification, Spectral Accumulation, and Spectral Evaporation; Theory, Implementation, and Compositional Implications

Building upon convolution-based EQ (Settel and Lippe 1997 rev. 2001) spectral analysis data is utilized to attenuate FFT bins (derived from an FFT analysis of noise) to create an FFT/IFFT-based subtractive analysis/resynthesis module. Techniques for modification of analysis data prior to resynthesis, producing a variety of effects, are examined and demonstrated. Methods for retaining informatio...

Real-time Spectral Synthesis for Wind Instruments

A real-time spectral domain monophonic synthesizer is being developed. The idea is to achieve the sound quality given by samplers and improve the flexibility of control and model transitions between notes. The output sound is generated concatenating, transforming and synthesizing attacks and stationeries previously recorded by a real player that have been analyzed and stored in a database. A sp...