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2. Smaart - Wikipedia

   en.wikipedia.org/wiki/Smaart

   Smaart is a real-time single and dual-channel fast Fourier transform (FFT) analyzer. Smaart has two modes: Real-Time Mode and impulse response mode. Real-Time mode views include single channel Spectrum and dual channel Transfer Function measurements to display RTA, Spectrograph, and Transfer Function (Live IR, Phase, Coherence, Magnitude ...

3. PicoScope (software) - Wikipedia

   en.wikipedia.org/wiki/PicoScope_(software)

   [1] [5] PicoScope software enables analysis using FFT, a spectrum analyser, voltage-based triggers, and the ability to save/load waveforms to disk. [1] [5] PicoScope is compatible with parallel port oscilloscopes and the newer USB oscilloscopes. The software has been described as "very good for laptops" and can be used with desktop or laptop ...

4. FreqTweak - Wikipedia

   en.wikipedia.org/wiki/FreqTweak

   FreqTweak is FFT-based, and supports up to four channels. An FFT analysis is applied to each audio channel, and every individual frequency band can have a different effect applied to it. In version 0.6.1 the following effects are available:

5. Comparison of free software for audio - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_free...

   Dual channel FFT tool for equalization of sound systems using the transfer function. GPL-2.0-or-later: Praat: Paul Boersma and David Weenink of the University of Amsterdam Yes Yes Yes A program for the analysis of speech in phonetics. GPL-2.0-or-later: Sonic Visualiser: Centre for Digital Music at Queen Mary, University of London: Yes Yes Yes ...

6. Fast Fourier transform - Wikipedia

   en.wikipedia.org/wiki/Fast_Fourier_transform

   An example FFT algorithm structure, using a decomposition into half-size FFTs A discrete Fourier analysis of a sum of cosine waves at 10, 20, 30, 40, and 50 Hz A fast Fourier transform ( FFT ) is an algorithm that computes the Discrete Fourier Transform (DFT) of a sequence, or its inverse (IDFT).

7. FFTW - Wikipedia

   en.wikipedia.org/wiki/FFTW

   The Fastest Fourier Transform in the West (FFTW) is a software library for computing discrete Fourier transforms (DFTs) developed by Matteo Frigo and Steven G. Johnson at the Massachusetts Institute of Technology. [2] [3] [4] FFTW is one of the fastest free software implementations of the fast Fourier transform (FFT).

8. Spectrum analyzer - Wikipedia

   en.wikipedia.org/wiki/Spectrum_analyzer

   An FFT analyzer computes a time-sequence of periodograms. FFT refers to a particular mathematical algorithm used in the process. This is commonly used in conjunction with a receiver and analog-to-digital converter. As above, the receiver reduces the center-frequency of a portion of the input signal spectrum, but the portion is not swept.

9. SciPy - Wikipedia

   en.wikipedia.org/wiki/SciPy

   SciPy (pronounced / ˈ s aɪ p aɪ / "sigh pie" [2]) is a free and open-source Python library used for scientific computing and technical computing. [3]SciPy contains modules for optimization, linear algebra, integration, interpolation, special functions, FFT, signal and image processing, ODE solvers and other tasks common in science and engineering.