Solved

Audio compression

Posted on 1998-11-29
7
158 Views
Last Modified: 2010-04-04
How to make/convert wav file to mp3 file with a delphi 3.
0
Comment
Question by:mee27
7 Comments
 

Author Comment

by:mee27
ID: 1348481
Edited text of question
0
 
LVL 3

Expert Comment

by:williams2
ID: 1348482
MP3's are really just a long sequence of numbers, that figures in a rather complex formular.

The principe is to
1. split the bandwidth into severel frequencies
2. construct a formular, which amplitude looks approx. like the waveform. The formular consists mainly of sines and cosines with variations in length and amplitude.
3. The mp3 stream is constructed by a number of frames, each with it's own 4 bytes long header with information on how to decrypt the folowing sequence of numbers. The header is described as an ISO standard.

If you have no mathematical experience, I surgest you to experiement on using existing components or code.

If you decide to give it a try anyway, I can provide you with information on how to analyse the header.

/Williams
0
 
LVL 4

Expert Comment

by:jack_p50
ID: 1348483
you better search the net for sound-components, because mp3 is very difficult format, and even if you can do it yourself, it would be very long and hard.
0
Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

 
LVL 4

Expert Comment

by:BoRiS
ID: 1348484
mee27

I seem to recall seening a component that does just this at www.torry.ru, just go to the vcl section then sound effects...

Later
BoRiS
0
 
LVL 8

Accepted Solution

by:
ZifNab earned 100 total points
ID: 1348485
Hi mee27,

look at these, thats what I know about MP3 components :

there are components at : http://www.delphipages.com/ 

but they are made to talk with winamp, ...

other's, but not winamp 'needers'

    http://www.ig.com.ua/wabbit/programs/mpegplay.html 

    http://www.dialog-medien.de/html/products.html 

    http://www.ege.edu.tr/delphi/ftp/d20free/mpegplay.zip 

Regards, Zif.

BoRiS, can you email your url again? Thank you very much!
0
 
LVL 3

Expert Comment

by:bryan7
ID: 1348486
I have a component for that, to play a MP3 file.
It also can decode it to a wav file.

bryan
0
 

Author Comment

by:mee27
ID: 1348487
Thank you very much for your answers..and all the comments. This is a great one i have seen. Sorry i'm not so good in English..Thanks all.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Mydac connection data base issue 3 159
Intraweb download file link ? 1 138
drawing animated level bar based on numbers 3 99
DBCtrlGrid, Delphi, Scroll 7 15
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
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 video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

825 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