Where To Start With Fourier Analysis
May 2, 2012
I'm reading data from the microphone and want to perform some analysis on it. I'm attempting to generate a spectrum analyser something like this:
What I have at the moment is this:My understanding is that I need to perform a Fourier analysis - a Fast Fourier Transform ? - to extract the component frequencies and their amplitudes.
Can someone confirm my understanding is correct and exactly what type of Fourier transform I need to apply?
At the moment, I'm getting frames containing 4k samples from the mic (using NAudio). The buffer I've got is 16bits/sample (Signed Short). For reference, the above plot shows approx half a frame I'm coding in VB so any .Net libraries/examples (preferably on NuGet) would be of most use. I believe implementations vary considerably so the less I have to massage my data, the better.
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Apr 6, 2011
Fourier Transform for pictures in Visual Basic?
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Feb 28, 2011
I have made my application to start automaticly when windows start (registry ../currentversion/run/appname + path). In this mode the application start minimized and an little icon appear in the notification icon area. With this icon you can maximize the app or exit it.If you exit the app and start it again using the Menu (Start/programs etc) than the application start in minimized mode (and in this case I would like to have it in normal mode) because the setting autostart is still true.Is there a way you can detect when the application start when windows startup using the above registry or when people click on an icon in the programs menu (or desktop)?
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Jun 3, 2011
To write a problem analysis on the who wants to be a millioniare game, and i don't know to go about it.
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Jun 30, 2009
documents that are required for a project. Such as:e.g: What sort of document I have create at the requirement analysis phase...etc I need to know all the documents that are required from start to end of the software project.
What's the part that MSF (Microsoft Solutions framework) plays?If we need to use MSF, what sort of documents that are required from it?
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Dec 19, 2011
Write a program to analyze a list of grades to determine the number of A's, B's, C's, etc. after applying a curve percentage selected by the user. When the form loads it should contain all the grades and available curves in the list boxes on the left. The user selects a curve and clicks the "Apply Curve" button. The program should display the curved grades (based upon the selected curve) and the grade distribution in the list boxes on the right?
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Jul 10, 2009
I'm using VB 2005, and am hoping to have streaming video to my application with some sort of video analysis. Right now as a test, I have an axWindowsMediaPlayer control playing a video from a URL. I'm figuring I need to be able to detect the colors of the pixels in the video for simple analysis, but I haven't been able to do this yet. I've been able to view the pixel colors in every area of the screen except for the media player window (just shows up black, as if you were to make a screenshot of the media player video). Is this at all possible to do?
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Apr 1, 2011
I decided to try the Code Analysis tool that came with VB2010 (at some levels). It produced LOTS of fascinating comments. Many of the comments make no sense, such as one about not disposing of a type on all paths when there is only one path that ends with an explicit call to object.Dispose. I think the analysis engine is looking at some of the calls, but they all return to the caller properly.
[Code]...
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Oct 4, 2009
I intend to choose developing a Web Content Management System using asp.net with VB.net 2008 but I'm not sure about how long it takes to program such system. Is 4 months enough for developing such system? This 4 months is the duration of this semester and Includes about two months for analysis and design and the rest is left for implementation.
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May 8, 2009
I have been tasked with getting a asp.net (vb.net) talking to an analysis services engine on our production servers. The web server is a separate machine from the web server.The web server runs as the IUSR_ user.The application (of course) works on the development machine which has both IIS and Analysis services on it.The problem I see appears to be a permissions error (returned in the browser by the asp.net app):An existing connection was forcibly closed by the remote host ....
it is described in a similar post here: http:[url]......I am not a system admin, nor am I an expert in analysis services (why have I been tasked with this you ask? because other people haven't been able to get it working and it has fallen on me). I have tried creating and adding the user (IUSR_) to the sql server and added that user to the role. While that worked on my local machine, it did not work in our production environment where the sql and web servers are separate.
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Dec 7, 2009
Anyone know a good code analysis service or tool for vb.net? Like the one for c# with visual studio 2008 team edition or style cop for c#
Update:I am only using the visual studio pro in my new work place,so I could not use the code analysis for visual studio 2008 team edition
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Apr 28, 2009
With this assignment, you are provided with an incomplete object-oriented implementation of the GAME MANIA software system based on Visual Basic 2008. The specification and the subsequent modelling are explained in a case study titled Game Mania: GAME AND GAME CONSOLE RENTAL STORE.
An implementation of the following classes are made available as the basis of your development work:
1.Member
2.Stock
3.Stock Item
4.Optic Reader
5.Card Writer
6.Membership Card
[Code]...
Note that the user interface provided is very basic. You need to change it, as you feel appropriate so that it will reflect the required functionality. For example, in the present implementation version, no provisions were made in the user interface for querying and handling fines associated with late returns.Providing this aspect in the user interface might be necessary as part of handling renting of games and game consoles.
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Jul 19, 2010
I have a website where people do the data entry. I have data stored in SQL server.Now I need to push the data to 3rd party to do some analysis work.What are my options to do this kind of job?
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Oct 27, 2010
how we can connect dictionary with an application in vb.net for morphological analysis of a text
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Feb 26, 2009
In Guitar Hero the notes are saved on a .mdi file how can read the file ( analysis not audio playback ) ?
Attached File(s)
American_Idiot_MIDI.zip (1K)
Number of downloads: 97
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May 27, 2010
I'm writing a threaded multi-client chat application in VB.NET(2008). While the thread is running and a message is received from the server(in this particular case: "ping") i wish to copy the content of the variable holding the newly received data to another variable(as that first variable is constantly changing) and then later call the Checkmsg() sub which contains a select case to analyse the string and notice a particular command(in this case, when it notices "ping" as received data, I want it to send "pong" back to the server.) and react to it. Now the problem is the code actually "jumps" to the Checkmsg() sub, and fails to compare properly the received data to my select case argument. I've tried setting messageboxes at a couple of place to see if my data was somehow changed but even before the line that compares the two strings the message box prints "ping" and the select case is set to react to "ping" but it wont "move". Now I don't really understand, i've done much vb programming but i'm learning threads.
[Code]...
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Dec 12, 2011
Im trying to make a scholarship analysis. i want it to be determined by percentage points using the following criteria.
OVERALL GPA
MAJOR GPA
VOLUNTEERED HRS = NUMBER OF REPAIRS * 4
VOLUNTEERED T SHIRT HRS = NUMBER OF SHIRTS * 10
I have inputs for the users name, academic status, overall gpa , major gpa , number of repairs and number of shirts. so how could i use the information to give the user say like 10 out of 10.. if they have 4.0 and alot of hours.. or like 6 out of 10 if they r an average students and have little hours used.
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Jul 23, 2010
what im after is advice on writing a vb app. that compares the difference between two images captured from a cctv camera of a sports shooting target. the difference is a bullet hole in the target. i would also like the program to identify a score the bullet makes in relation to its location on the target and have that as an audio output sound file. the targets will be uniform so the template the program has never changes.
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Oct 23, 2009
I am writing a VB.NET Windows Application which takes numeric user-input and performs a complicated calculation, yielding many numeric output variables. Previously, I wrote a similar program in VB6, which output the results to a rich text box using fixed-width font in order to organize data in columns and used asterisks to delineate table areas and section borders. I then used the printer object for printing the output. This method was very archaic and difficult to modify when changes were necessary.
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Jan 24, 2012
When running code analysis on my project, I receive the following message:
CA1051 : Microsoft.Design : Because field 'ClassName.VarName' is visible outside of its declaring type, change its accessibility to private and add a property, with the same accessibility as the field has currently, to provide access to it.
Public VarName As String to this:Public Property VarName As String
I don't understand why the Property keyword is so important in this particular case. Can anyone provide an explanation as to why changing this member to a Property makes a significant difference to code analysis?
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Jul 24, 2011
I have custom asynchronous WebRequest class that I am testing to find out how fast the request will be cancelled and found some odd results, that starting 6 WebRequests with TPL and cancelling them right away takes 25 sec, but when I used just regular background threads it took only 5 sec.
Update: Running them without cancelling takes with Task.Start 9 sec and Thread.Start 3 sec accordingly.
Imports System.Net
Imports System.Threading
[Code]....
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Oct 21, 2011
im using vs to create a simple security form, i am successful to create a a form of log but i need some more improve like
1) if the software remain untouch for a minute the login form should be shown as the user try to use it again
2) and how the software start automatically when window start
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Aug 4, 2009
I'm using Process.Start to start an external command line application and using the StartInfo.Arguments method to send parameters to the application. I imagine I'll need to use a loop... but I can't figure out exactly how yet.I need to send anywhere from 1 - an infinite number of files names to this application. Each file has to be sent one after the other. So once the first one is done, I need to loop back around and past the second one.I can probably use the Directory.GetFiles method to get all of the files, but I don't know how to assign them.
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Jul 23, 2009
I created 3 timers, i want each timer to take turn start which means timer1 stop then timer2 start, once timer2 stop timer3 start. But my code seem to be running together once i click the play button.And is there any ways to easy control how my picturebox move? Because my code for controlling it movement need to keep finding the correct number for it to move.
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Feb 24, 2012
Visual Basic 2010 - Net Framework 4.0 Client
I have an application (application #1) running with Administrator privileges on Windows 7.
I want application # 1 to start another application (application #2) without Administrator privileges so application #2 is running as a standard user.
Is there a way to do this? I have been using Process.Start.
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Jun 18, 2011
Here's what I currently have:
[Code]...
I've commented out various things to limit it to specifically this command (example, I can swap mklink out with notepad and it works fine). The command runs fine from a DOS window, but can't be found when I use it this way. I also tried using the SHELL command just to test and I get the same results. No idea why it can't be found, as like I said it executes from the command prompt just fine.
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Mar 12, 2009
[code]...Cannot Start a Service After Changing 'Start' Property Through Registry
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Aug 18, 2007
I am confused with the terms Build ,rebuild ,start , start without debugging in VS.NET.After writing the code what actually we want to do .We have to run directly by pressing F5 key or we have to build the solution .Usually i tried to run the application after coding and if shows any any errors i will fix that and run again .I never used build or rebuild thing .What exactly meant by building the solution .What is meant by rebuild and start without debugging.
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Feb 24, 2012
How can I get my application to load the Sub Main at the start rather than loading a form on start up.
I have tried declaring 'Public Sub Main' on my forms and in some modules, yet in my project properties, it is not one of the options.
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Mar 29, 2009
How can I make it so when a button is clicked it will make the program start on start-up but only if the checkbox is checked?
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