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Thread: How to display sound signal waveforms continously?

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    Default How to display sound signal waveforms continously?

    Hi everyone!

    I actually don't know if I am posting in the right forum. Here is my problem, I'm going to create a java application that takes speech as its input and one of the modules is to display the speech signals in a waveform (spectrum visualizer?) while an input is being read (i.e. while someone is speaking / reading from a .wav file). As of now, I still cannot find a way to do this. I hope someone can help me on this. Thanks in advance!

    BTW, i need a display that is "moving"/"oscillating" such as the one being displayed in Audacity or in some applications for audio. *wondering if I can use MatLab, Audacity, or any jar file *

    Any kind of help will be appreciated. Thanks in advance! God Bless!
    Last edited by ces_31; August 9th, 2009 at 11:41 AM.


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    Default Re: How to display sound signal waveforms continously?

    that's a lot of work to create from scratch... This link should help you with the WAV file format. As for drawing, you can use Swing or AWT.
    Last edited by helloworld922; August 9th, 2009 at 11:24 PM.

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    ces_31 (August 10th, 2009)

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    Default Re: How to display sound signal waveforms continously?

    Quote Originally Posted by helloworld922 View Post
    that's a lot of work to create from scratch... This link should help you with the WAV file format. As for drawing, you can use Swing or AWT.
    hi helloworld922! thanks for the reply... you said that it is hard to create from scratch, do you know if i can use any jar file or something which i can import in java??? (i.e. matlab)
    pardon me, this is my first time in digital signal processing...

    BTW, thanks again for any info you can give...

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    Default Re: How to display sound signal waveforms continously?

    Hmm... Audacity is free and open source. You can try and look at their source code, and hopefully make your own port to Java. I also found something called WAV Pack. I think it's mostly for WAV compression/decompression, but if it might help you with reading WAV streams, and has a Java extension.

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    ces_31 (August 10th, 2009)

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    Default Re: How to display sound signal waveforms continously?

    thanks again for the reply helloworld922! i'll try your suggestions

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