Recent content by inadaze

Hey, I was wondering: If I had two points connected by a line on a cartesian plane(x and y for this) and i wanted to draw a third point, how could i tell if the third point was drawn somewhere on the line? I am programing a game where there is already a line drawn to connect to points and the...

Maybe this is a strange question for this forum, but you guys tend to surprise me with great answers...so.. A few years ago, a teacher of mine showed me a stereo image. He explained that it was two photographs taken 2.5 inches next to each other. This gives the perception of depth. Its like...

Hi all, sorry if this is a little off the normal topic. I was wondering if anyone knew how to rig up a casio keyboard, that has no midi, so that it can send midi data? I have a little bit of skill with electronics, some free time and a casio that I don't mind wrecking. If anyone knows please...

laymen Thanks for your reply. What I failed to mention was that I have a very low understanding of math. Could you explain that again in laymen terms. Thanks Jay

Hey, I was wondering if anyone could explain to me the meaning of "real and imaginary parts of a complex signal"? Thanks Jay

Hi, I am using matlab. I was wondering if anyone knew how to take the results from a spectrum analysis of a signal in x at sample frequency fs: y = abs(fft(x,fs)); and turn it back into the signal x. My purpose is to modify the spectrum by removing certain frequencies found in the spectrum...

When I take an FFT I get a mirror reflection opposite the peaks. Do I take these as well when calculating the mean? Also, when I calculate the standard deviation it gave me this number: 0 +5.8949e+004i What does this mean? do I add this to the mean to find out what is considered a peak? Or...

Thanks for your reply, but unfortunately I am not that educated in these terms. Could you really spell it out for me...I don't know what is the "mean" and "standard deviation(although I can guess at this)" of values in the "bins". Sorry to make you elaborate, but I am kinda new to this...

Hi all, I am trying to write a code that can determine peaks in a signal. What I am doing is recording a signal then running an fft to calculate the fundamental frequency and the overtones (consonant and dissonant harmonics). The problem is that some of the peaks are very small but are always...

Low E Here is an example of my low E on a guitar after the FFT. here you can see what I was talking about. Jay

I just thought of something. Is the Fundamental Frequency always the intented frequecny. What I mean is if I hit the low E string on my guitar which should be analyzed at 329.63 Hz (if my sources are correct) could it be possible that the fundamental of this string is something other then...

okay, that makes sense. Now when I analyze some instruments, I get peaks at dissonant intervals (not at steady intervals of the fundamental). What are these and how could I interpret them? Jay

Wow, your helping me out everywhere on this forum. ha. thank you. So, what your saying is that if I were to run an FFT on any sound and count the amount of Harmonics I would be able to tell what instrument it is? What about a guitar for instance...depending on where the string is struck it...

Alright, my mistake in over generalizing the way we percieve sound. But is there anything else that could act in the same means as the way sound is transmitted?

What your saying may solve the problem I am having, but I don't fully understand. I am new to this sort of thing. I noticed that when I record a sound in x, then run: F = abs(fft(x,fs)); I get a bunch of peeks at what seems to be frequency levels. I was told that the first peek is the...