Solved

Multimedia Tools, TMMPeakDetect & FFTLength

Posted on 2004-04-27
2
167 Views
Last Modified: 2010-04-05
Multimedia Tools, TMMPeakDetect & FFTLength

I am working with Multimedia Tools and TMMPeakDetect component.
And I have one question.

What is FFTLength (Fast Fourier Transform) ?

When I set FFTLength to 64 and after that to maximal 16384, the details of sound frequency volume are different.

I need true details about sound.

Is that have some things with sound quality (if we put FFTLength higher or lower and get sound frequency amplitude) ?

It is maximal true if I put FFTLength to 16384 ?

In how many decimals goes frequency in computers ?

This is a code :

procedure TForm1.Button1Click(Sender: TObject);
var frequency:integer;
begin
frequency:=0;
Memo1.Clear;
while frequency<1500 do
begin
memo1.Lines.Add(inttostr(frequency)+'_'+inttostr(MMPeakDetect1.GetPeakIndex(frequency))+'_'+inttostr(MMPeakDetect1.Peaks[MMPeakDetect1.GetPeakIndex(frequency)]));
inc(frequency)
end;
end;

The problem is that I want to set with this informations (TMMPeakDetect) about 41000 TMMGenerators and simulate sound of music in real-time.

Thanks.
0
Comment
Question by:cvbmn
2 Comments
 
LVL 11

Accepted Solution

by:
shaneholmes earned 500 total points
ID: 10931828
Not sure if this will help, but here is a vast amount of info on FFT & delphi...

http://www.efg2.com/Lab/Library/mathematics.htm#Fourier

Shane
0
 

Author Comment

by:cvbmn
ID: 10945543
I have Intel Pentium on 400 Mhz with 256 Mb of RAM.

Is it this enough to experiment with TMMGenerators ?

For example : 100s AM TMMGenerators and 41000 stereo Hz

There was a problem with this example.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now