NullPointer exception using Arduino?

Programming Questions

Rory Kuma

NullPointer exception using Arduino?

in Programming Questions • 2 years ago

I am using the Processing code found here http://remotedevice.net/project/sonar-tonebank/ with Processing 1.5.1. The error I am getting is

Exception in thread "Animation Thread" java.lang.NullPointerException
    at ddf.minim.javasound.JSMinim.getAudioInputStream(JSMinim.java:604)
    at ddf.minim.javasound.JSMinim.getAudioSample(JSMinim.java:309)
    at ddf.minim.Minim.loadSample(Minim.java:305)
    at tonebank_processing.setup(tonebank_processing.java:68)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:662)

I'd like to also point out that I haven't the faintest idea what I'm doing. So uh, when I want to run this, should I first upload the Arduino code found on the site, then present the Processing code and hope it works? What's the protocol here?
/huge noob sorry

(don't kill the noob)

Replies(4)

jeff_g

Re: NullPointer exception using Arduino?

2 years ago

It's trying to load a sound file and can't find it. You need the wav files, such as "F#3.wav" in your data directory.

Rory Kuma

Re: NullPointer exception using Arduino?

2 years ago

It's just using the Minim sound library though. Why can't it load the files and where might I find them?

(don't kill the noob)

jeff_g

Re: NullPointer exception using Arduino?

2 years ago

Those sound files are not part of Minim. Minim is a library for reading and playing sound files, but you have to provide your own sounds. As for those particular sounds, the author of the article states "Any set of samples could be used (for this version, I’m using 16 different short sound textures generated with Reason)". It does not appear that he provides a link for downloading them.

Rory Kuma

Re: NullPointer exception using Arduino?

2 years ago

Ah, and here I was thinking Minim was a sound library! That's what I get for not doing my research, hehe.
Thanks for your help, I got a set of tones from freesounds.org and my theremin is almost up and running. Almost. Don't be surprised if you see a few more questions from this particular noob...

(don't kill the noob)

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