FFT & WAVELETS – IRZU INSTITUTE

libfftw from Void

February 12, 2022admin

libfftw Library for computing the discrete Fourier transform (DFT) – runtime libraries Details Homepage: www.fftw.org/ License: GPL-2.0-or-later Maintainer: Orphaned Built at: 2021-10-03 07:04 – 2021-10-03 07:20 Installed size: 2.21 MiB…Read morelibfftw from Void

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

FFTW producing different results from numpy.fft

February 6, 2022admin

FFTW claims: “FFTW computes an unnormalized DFT” That is, for ifft they compute However, as stated on for instance wikipedia, the inverse DFT is defined as So the fftw output…Read moreFFTW producing different results from numpy.fft

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

FFTW backwards transform is multiplied by N

January 30, 2022admin

As you can see in the documentation, FFTW computes an unnormalized transform. That is, an additional division by the length of the signal is necessary to recover the input signal…Read moreFFTW backwards transform is multiplied by N

ACOUSTICS & DSP DATA MANAGEMENT FFT & WAVELETS RESEARCH

python – Why FFT is different? Why so many frequencies?

January 28, 2022admin

Please help me here. Here ‘hrir’ is a matrix which has 4 time responses. I am trying to build another matrix ‘c_f’ which will have FFT’s of these hrir’s. When…Read morepython – Why FFT is different? Why so many frequencies?

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

Accepted fftw 2.1.5-6 (source) into unstable

January 20, 2022admin

—–BEGIN PGP SIGNED MESSAGE—– Hash: SHA512 Format: 1.8 Date: Wed, 19 Jan 2022 16:38:42 +0100 Source: fftw Architecture: source Version: 2.1.5-6 Distribution: unstable Urgency: medium Maintainer: Debian Science Team <debian-science-maintain…@lists.alioth.debian.org>…Read moreAccepted fftw 2.1.5-6 (source) into unstable

3D PRINTING ACOUSTICS & DSP DATA MANAGEMENT FFT & WAVELETS RESEARCH

Fast Fourier Transform Concepts | bartleby

January 13, 2022admin

Fast Fourier transform DTF and IDTF computations can be computed using fast Fourier transform algorithms. It was first introduced by Carl Friedrich Gauss in 1805. Later on, it was developed…Read moreFast Fourier Transform Concepts | bartleby

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

Get sound frequency with Android FFT

January 7, 2022admin

Your FFT code doesn’t give you frequency. It gives you an array of complex values at a bunch of different frequencies. And there may be a bug in your code…Read moreGet sound frequency with Android FFT

FFT & WAVELETS JS, REACT & NODE RESEARCH

Accepted pyfftw 0.13.0-1 (source) into unstable

January 6, 2022admin

—–BEGIN PGP SIGNED MESSAGE—– Hash: SHA256 Format: 1.8 Date: Wed, 05 Jan 2022 00:08:32 +0100 Source: pyfftw Architecture: source Version: 0.13.0-1 Distribution: unstable Urgency: medium Maintainer: Debian Science Maintainers <debian-science-maintain…@lists.alioth.debian.org>…Read moreAccepted pyfftw 0.13.0-1 (source) into unstable

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

Can a FFT be decomposed into multiple parallel channels?

January 5, 2022admin

So, decomposing a large DFT into smaller DFTs, where some computations are redudant, is exactly the trick the Cooley-Tukey algorithm uses. So, your FFT is already doing that internally, and…Read moreCan a FFT be decomposed into multiple parallel channels?

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

Failure to find FFTW libraries on Mac Big Sur (11.3.1)

January 5, 2022admin

Im sure anyone reading this is all too familiar with issues such as mine (given by the number of posts referring to this issue). I am running Mac OS X…Read moreFailure to find FFTW libraries on Mac Big Sur (11.3.1)

ACOUSTICS & DSP DATA MANAGEMENT FFT & WAVELETS RESEARCH

changing FFT resolution of known sweep signal leads to unexplained spectrum

January 5, 2022admin

Hi All, Below is fft of a sweep signal “x” which is 1.08MHz wide at edge of otherwise empty LTE 10MHz bandwidth. The sweep range is -4.5MHz ~ -3.42, with 839 tones…Read morechanging FFT resolution of known sweep signal leads to unexplained spectrum

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

fftw-3.3.9.zip: fftw-3.3.9/doc/html/index.html | Fossies

January 4, 2022admin

Caution: In this restricted “Fossies” environment the current HTML page may not be correctly presentated and may have some non-functional links. You can here alternatively try to browse the pure…Read morefftw-3.3.9.zip: fftw-3.3.9/doc/html/index.html | Fossies

FFT & WAVELETS RESEARCH

Report: NVIDIA to Launch RTX 3080 Ti Laptop GPU with 16 Gbps GDDR6

December 29, 2021admin

VideoCardz.com Says RTX 3080 Ti Mobile Arrives Next Month Everyone’s favorite website about video cards spelled with a Z has reported on what they are calling a “confirmed” new product…Read moreReport: NVIDIA to Launch RTX 3080 Ti Laptop GPU with 16 Gbps GDDR6

FFT & WAVELETS MQTT & IOT AUTOMATION RESEARCH

raspbian bullseye – PiGPIO Library yields unstable timing in waveform

December 29, 2021admin

I want to drive an IR LED Emitter with certain pulse waveforms to emulate an IR remote control using the PiGPIO Library on a Raspberry Pi Zero W (1.1). Based…Read moreraspbian bullseye – PiGPIO Library yields unstable timing in waveform

ACOUSTICS & DSP FFT & WAVELETS RESEARCH

AbstractFFTs instead of FFTW – githubmate

December 28, 2021admin

ImageCore softly depends on FFTW with @require just to provide the suggestive error messages (cf. #106). However, for several years now, its APIs have been defined in AbstractFFTs. Therefore, I…Read moreAbstractFFTs instead of FFTW – githubmate

FFT & WAVELETS LINUX & ANDROID RESEARCH

Hardware encoding – really confused after switching from Manjaro to EOS – #12 by jonathon – Multimedia

December 26, 2021admin

I recently switched from Manjaro to EOS on my main machine. It’s a laptop with a i5-10210U and I often use this computer to encode videos. Since the CPU is…Read moreHardware encoding – really confused after switching from Manjaro to EOS – #12 by jonathon – Multimedia

DATA MANAGEMENT FFT & WAVELETS

Full Waveform Ambient Noise Tomography for the Northern Mississippi Embayment – Yang – – Journal of Geophysical Research: Solid Earth

December 23, 2021admin

We use seismic ambient noise data recorded by broadband stations around the northern Mississippi Embayment to develop a three-dimensional shear wave velocity model with full waveform inversion. Empirical Green’s functions…Read moreFull Waveform Ambient Noise Tomography for the Northern Mississippi Embayment – Yang – – Journal of Geophysical Research: Solid Earth

ACOUSTICS & DSP FFT & WAVELETS KERNEL STREAMING

Constant DirectX Crashes

December 22, 2021admin

played through the early access with little hiccups (a few crashes) but now I can’t even get to the loading screen without crashing. If i get lucky enough to…Read moreConstant DirectX Crashes

FFT & WAVELETS

Next Softube Synths – Page 4 – Instruments Forum

December 21, 2021admin

Introspective wrote: ↑ Sun Dec 19, 2021 4:23 pm Agreed. Their VSTs sound like toys. …which is fine for the digital synths (Triton, Wavestation, M1, Prophecy), but their analog emulations…Read moreNext Softube Synths – Page 4 – Instruments Forum

3D PRINTING ACOUSTICS & DSP FFT & WAVELETS KERNEL STREAMING

SZMZ GeForce GTX 960 DirectX 12 GTX 960 GAMING 4G 4GB 128-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support ATX Video Card

December 21, 2021admin

• 100% Original GTX 960 chipse• 100% Genuine 4GB GDDR5 128 Bit• Core frequency: 1190/1253 MHz• Memory frequency:7010MHz• The maximum resolution:4096 × 2160• Interface Type:PCI Express 3.0 16X• I/O interface:…Read moreSZMZ GeForce GTX 960 DirectX 12 GTX 960 GAMING 4G 4GB 128-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support ATX Video Card