forum.alglib.net

ALGLIB forum
It is currently Thu Oct 03, 2024 10:18 pm

All times are UTC


Forum rules


1. This forum can be used for discussion of both ALGLIB-related and general numerical analysis questions
2. This forum is English-only - postings in other languages will be removed.



Post new topic Reply to topic  [ 1 post ] 
Author Message
 Post subject: help me in FFT explanation
PostPosted: Mon May 09, 2011 10:50 am 
Offline

Joined: Mon May 09, 2011 10:44 am
Posts: 1
I would like to use this LIB in my study. I have i.e. one WAVE file:
- an audio 10 sec
- 1 channel – mono
- 44100 Sample/sec
- 8 bit/sample (1byte).
The length of the audio is 10sec*1 channel *1 byte/sample*44100 sample/sec=4.410.000 byte.

What I want is to get amplitude and a frequency for each sample, update them and write back to the WAVE file. I am going to use the FFT and your method for it xalglib.fftr1d(x, f), where
x - is an array of samples and
f - is an output array.

This output array consists of 2 subsets: real and imagine. How can I use these subsets for getting frequencies and amplitudes?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC


Who is online

Users browsing this forum: Bing [Bot] and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group