CODEWITHSUNDEEP
javavisualizationmicrophone
TeNNoX
TeNNoX

Reputation: 2075

visualize microphone audio in Java

Is there a way to visualize audio in Java in a kind of wave?

How should I start, I already set up a microphone selection an a Thread to read the bytes from the TargetDataLine into a buffer. But what should I do now?

Any help would be appreciated.

Upvotes: 1

Views: 1169

Answers (1)

Javier
Javier

Reputation: 12388

If you are using the Java Sound API, the data that you have read is 8 or 16 bits PCM. If it is 8-bit then it is fine, otherwise you may need to adjust the endianess.

If you are reading 8-bit PCM, each byte is a sample, then the value of that byte is the sound sample. If you are reading 16-bit PCM, then the samples are packed either as hi,lo,hi,lo or lo,hi,lo,hi (where hi and lo are high and low order bytes) depending on endianness. In that case you should convert that to a short value.

For plotting you will need a 3rd party library, such as freechart or jahuwaldt.plot. (I used the latter on a real time wave visualization program).

Upvotes: 2

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