6 min 31 sec
FFT Tutorial
Tony and Ian from Tektronix present a FFT Tutorial (Fast Fourier Transform) covering what ...
published: 05 Jun 2014
FFT Tutorial
FFT Tutorial
Tony and Ian from Tektronix present a FFT Tutorial (Fast Fourier Transform) covering what is FFT, an explanation of the FFT function as well as different FFT applications. They explain how the FFT works with a FFT example and show an oscilloscope demo to demonstrate how helpful the FFT can be. What is FFT? In the video, "How to Use an Oscilloscope" (http://youtu.be/tzndcBJu-Ns), an oscilloscope was used to look at a single sine wave. But when you connect an oscilloscope to a live circuit, you rarely see something so simple. On real projects, you're usually looking at combinations of signals. The FFT lets you break down the data you've captured and see what it's made of. FFT Example One FFT example is when you want to understand your own signal. If you're designing a circuit board, and you attach your oscilloscope probe at the antenna, you're expecting the signal at the antenna to be at the frequency you designed it for. What you actually see is an extra signal. That extra signal is at a different frequency, and it's one you didn't expect to see. You'll notice you can't see it on the regular oscilloscope display before the FFT because it's 1/1000th the amplitude of the signal you're expecting. In the video FFT example, the cause is likely harmonic distortion since it's a multiple of the frequency we're expecting. If it were an exact multiple of some known clock board, then the likely cause would be cross-talk. How FFT Works The FFT helps you see what kinds of signals are present in your system. Specifically, it breaks down your complicated signal into separate sine waves. Any signal at all can be thought of as the sum of different sine waves (the Fourier Transform). The oscilloscope's FFT, or Fast Fourier Transform, is just one method of performing this operation. FFT Applications Most oscilloscopes have a FFT built into their math system these days. In the oscilloscope featured in the video, you just press Math and then turn on the FFT option. Then you can set various properties of the analysis, like the frequency range you want to look at. In the video example, you can see that same series of frequency-domain spikes stretching out. This is kind of a pared-down version of what you'd see on a spectrum analyzer. If you wanted something more like a real spectrum analyzer, you could use a mixed domain oscilloscope with a dedicated RF channel. The mixed domain oscilloscope in the video shows a FFT of the signal from a completely separate input. The idea is that you use the regular analog channels to look at the various signals on your board, and use the RF channel to see what's actually coming out of your antenna port. For more FFT Information go to: www.tek.com/fft-basics Also, keep an eye out for the next video in this series, covering a FFT example where the FFT function is used to measure musical signals in front of a live audience.- published: 05 Jun 2014
9 min 22 sec
32 - Fast Fourier Transform
In this lecture, we discuss how to compute the discrete fourier transform quickly via the ...
published: 05 Jun 2014
32 - Fast Fourier Transform
32 - Fast Fourier Transform
In this lecture, we discuss how to compute the discrete fourier transform quickly via the fast fourier transform algorithm This lecture is adapted from the ECE 410: Digital Signal Processing course notes developed by David Munson and Andrew Singer- published: 05 Jun 2014
5 min 2 sec
Understanding The FFT
Jamie Anderson discusses the fundamentals of the Fast Fourier Transform and how it is used...
published: 05 Jun 2014
Understanding The FFT
Understanding The FFT
Jamie Anderson discusses the fundamentals of the Fast Fourier Transform and how it is used to display audio data.- published: 05 Jun 2014
57 min 31 sec
Lec-22 FFT and Computer Aided Design of Filters
Lecture Series on Digital Signal Processing by Prof.T.K.Basu, Department of Electrical Eng...
published: 05 Jun 2014
Lec-22 FFT and Computer Aided Design of Filters
Lec-22 FFT and Computer Aided Design of Filters
Lecture Series on Digital Signal Processing by Prof.T.K.Basu, Department of Electrical Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in- published: 05 Jun 2014
14 min 18 sec
FFT エルムドアから源氏シリーズを盗む Steal the Genji from Elmdor
ファミ通黒本によると小数点以下で盗める源氏装備。
しかし国内版FFTでは絶対に盗めなかった。
ところが北米版FFTでは盗めるようになっています。...
published: 05 Jun 2014
FFT エルムドアから源氏シリーズを盗む Steal the Genji from Elmdor
FFT エルムドアから源氏シリーズを盗む Steal the Genji from Elmdor
ファミ通黒本によると小数点以下で盗める源氏装備。 しかし国内版FFTでは絶対に盗めなかった。 ところが北米版FFTでは盗めるようになっています。- published: 05 Jun 2014
2 min 38 sec
Final Fantasy Tactics OST - Trisection ~ Battle Theme #1
Higher quality: http://www.youtube.com/watch?v=rVrQv36YFgg&fmt;=18
Music from the soundtra...
published: 05 Jun 2014
Final Fantasy Tactics OST - Trisection ~ Battle Theme #1
Final Fantasy Tactics OST - Trisection ~ Battle Theme #1
Higher quality: http://www.youtube.com/watch?v=rVrQv36YFgg&fmt;=18 Music from the soundtrack of Final Fantasy Tactics. Title: Trisection Composer: Hitoshi Sakimoto Check my playlists for more songs of Final Fantasy Tactics and other game music: http://www.youtube.com/profile_play_list?user=PeyserConley- published: 05 Jun 2014
Vimeo results:
11:09
Wave Spectrum ICE Node Tutorial
So here is the tutorial around the Spectrum Wave ICE Node which I used for https://vimeo.c...
published: 15 May 2012
author: claude vervoort
Wave Spectrum ICE Node Tutorial
So here is the tutorial around the Spectrum Wave ICE Node which I used for https://vimeo.com/41955919. The node and the code is available on github: https://github.com/claudevervoort-perso/xsi-audio-spectrum
If you try the add on, know it is very beta. If you have issues with it, let me know. I'll see what I can do in the time I have.
Good luck and thanks for watching!
14:33
Processing Tutorial #5
Learn how to use the FFT class in the minim Processing library to make audio reactive visu...
published: 13 Nov 2009
author: Switchboard
Processing Tutorial #5
Learn how to use the FFT class in the minim Processing library to make audio reactive visuals.
The fifth Processing tutorial from Andy Best
3:50
Running cubes II
I like it more with this music... The terrain altitudes are a direct visualization of the ...
published: 07 Feb 2008
author: Inigo Quilez
Running cubes II
I like it more with this music... The terrain altitudes are a direct visualization of the fft, that's why it matches the sound (no manual work here, just drop a new mp3, and everything will be synchronized also). Only the little camera shacking were synched manually (something to fix). I want to improve the rendering too, make it faster, and shadows and other details, it looks too white to me.