Solved

How to set gain (volume) using JMF?

Posted on 2004-03-22
6
4,812 Views
Last Modified: 2012-06-27
Hi,

I want to play some sound files with java using the JMF (as backgroundmusic) so I want to use sliders to change the volume (or gain) while playing the music.
How do I do this?

I am using code like this to play the sound

public SoundDemo(String resourceName)
      {
            System.out.println("Playing: " + resourceName);
            
            try
            {
                  URL url = this.getClass().getResource(resourceName);
                  System.out.println(url);
                  
//                  Player p = Manager.createPlayer(url);
                  p.start();
                  int state = p.getState();
                  while (state != Controller.Started)
                  {
                        try
                        {
                              Thread.sleep(100);
                              state = p.getState();
                        }
                        catch (Exception e)
                        {
                              e.printStackTrace();
                        }
                  }
                              }
            catch (Exception e)
            {
                  e.printStackTrace();
            }
      }

so the sound is played fine, I do not know how to access (or use) the getDB() and setDB() methods provided from JMF.
I tried p.getGainControl(); to use these methods.

Anybody any idea how to set the volume from a player object from the Java Media Framework?

Thank you for your help!

CU gnurl
0
Comment
Question by:gnurl
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
6 Comments
 
LVL 16

Expert Comment

by:krakatoa
ID: 10652788
Take a look at the GainControl interface.
0
 
LVL 16

Expert Comment

by:krakatoa
ID: 10652816
and ...

getControlComponent
public java.awt.Component getControlComponent()Get the Component associated with this Control object. For example, this method might return a slider for volume control or a panel containing radio buttons for CODEC control. The getControlComponent method can return null if there is no GUI control for this Control.
0
 
LVL 7

Author Comment

by:gnurl
ID: 10653060
Hi,

I played around with these objects, but I couldn't get it working.

How do I connect the slider to the player? Do you have any code examples?

Thanks!
0
Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

 
LVL 16

Accepted Solution

by:
krakatoa earned 125 total points
ID: 10653695
// To create a Clip object, see e723 Loading and Playing Sampled Audio
   
    // Set Volume
    FloatControl gainControl = (FloatControl)clip.getControl(FloatControl.Type.MASTER_GAIN);
    double gain = .5D;    // number between 0 and 1 (loudest)
    float dB = (float)(Math.log(gain)/Math.log(10.0)*20.0);
    gainControl.setValue(dB);
   
    // Mute On
    BooleanControl muteControl = (BooleanControl)clip.getControl(BooleanControl.Type.MUTE);
    muteControl.setValue(true);
   
    // Mute Off
    muteControl.setValue(false);


from java almanac


Home > List of Packages > javax.sound.midi  [7 examples] > Properties  [4 examples]

e721. Setting the Volume of Playing Midi Audio
    // To create a Sequencer object, see e716 Loading and Playing Midi Audio
   
    if (sequencer instanceof Synthesizer) {
        Synthesizer synthesizer = (Synthesizer)sequencer;
        MidiChannel[] channels = synthesizer.getChannels();
   
        // gain is a value between 0 and 1 (loudest)
        double gain = 0.9D;
        for (int i=0; i<channels.length; i++) {
            channels[i].controlChange(7, (int)(gain * 127.0));
        }
    }

from same source. Hopefully these have one or two pointers for you.
0
 
LVL 7

Author Comment

by:gnurl
ID: 10681444
Thanks,

it seems that it works this way... :)

gnurl
0
 
LVL 16

Expert Comment

by:krakatoa
ID: 10681513
Great! Glad to hear!

k.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
iterator/ListIterator approach 17 68
Chrome and Firefox Java 5 90
Glassfish admin console not working 1 88
Crystal Reports Licensing Questions 4 87
Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Suggested Courses

752 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