Learn mp3 format and audio signal processing

Posted by Shankhoneer Chakrovarty on Stack Overflow See other posts from Stack Overflow or by Shankhoneer Chakrovarty
Published on 2012-03-23T05:24:32Z Indexed on 2012/03/23 5:30 UTC
Read the original article Hit count: 329

Filed under:

java

|

mp3

I am trying to learn the following things:

How mp3 file looks like internally? I found this: http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html but it seems old. Is there any recent changes to the format? I couldnt find any.
How to open a mp3 file in java and look for bytes? I tried using audiostream but I am getting a lot of zeros and signed short integers which nowhere resemble the header/body format as mentioned in the above link. Am I wrong in interpreting the bytes?
How to get amplitude, frequency and pitch of a mp3 file? No idea. Can you please suggest some book or tutorial?

Can you please help me in getting the solution for the above questions? I am sorry if some questions appear to be naive, I am a just begun to learn mp3.

Thanks

© Stack Overflow or respective owner

Related posts about java

Tomcat 6: Access Control Exception?

as seen on Server Fault - Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More
failing to establish connection between Postgres db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
failing to establish connection between postgre db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
Migration and deployement problems JBoss 4.2.2.GA to JBoss 6.0.0.M2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2 I give you some log to explain my problem : boot.log : 2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments… >>> More

Related posts about mp3

Concatenating several .mp3 files into one .mp3

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
As it was suggested here I am using cat command to concatenate several .mp3 files into one .mp3 file. Imagine, I have following .mp3 files in the current folder: 001001.mp3 001002.mp3 001003.mp3 001004.mp3 001005.mp3 or, like this: 096001.mp3 096002.mp3 096003.mp3 096004.mp3 I need to concatenate… >>> More
Paperclip validates_attachment_content_type for mp3 triggered when attaching mp3

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey everyone, Struggling to workout when i add the following validtion to my Voice model using paperclip, it is being triggered when i try and upload an mp3: class Voice < ActiveRecord::Base has_attached_file :clip validates_attachment_presence :clip validates_attachment_content_type :clip… >>> More
concatenating mp3 files or joining mp3 files using java

as seen on Stack Overflow - Search for 'Stack Overflow'
We would like to concatenate/merge/join mp3 files seamlessly using "java" in any environment. We are trying the following options at the moment ( please let us know any other options): Using JMF -- ruled out as it supported only in windows http://java.sun.com/javase/technologies/desktop/media/jmf/reference/faqs/index… >>> More
How To Add MP3 Support to Audacity (to Save in MP3 Format)

as seen on How to geek - Search for 'How to geek'
You may have noticed that the default installation of Audacity doesn’t have built-in support for MP3s due to licensing issues. Here’s how to add it in yourself for free really easily in few simple steps. Photo by bobcat rock Latest Features How-To Geek ETC HTG… >>> More
Converting .wav (CCITT A-Law format) to .mp3 using LAME

as seen on Super User - Search for 'Super User'
I would like to convert wav files to mp3 using the lame encoder (lame.exe). The wav files are recorded along the following specifications: Bit Rate: 64kbps Audio sample size: 8 bit Channels: 1 (mono) Audio sample rate: 8 kHz Audio format: CCITT A-Law If I try to convert such a wav file using lame… >>> More