Hackers in Residence: The Sound Visualizer

Contributors:

onebeartoe

Software Usage

Now we will discuss how to execute the Sound Visualizer file.

The SSH program allows you to login to the Raspberry Pi.

ssh pi@raspberrypi.local

Once logged in via ssh, run the application from the JAR file that was copied to the Raspberry Pi. This command runs the application:

java -jar sound-visualizer.jar

With the application running, the Web controls for the the sound visualizer are available at this URL:

http://192.168.1.105:2014/

Heads up! Make sure you replace this IP address with the correct IP address or hostname of your Raspberry Pi.

Here is a screen grab of the Web interface:

The application has several modes. The sound visualization mode is controlled by a drop down menu on the Web interface.

Off - stops all animation
Blob - like a scatter plot; more sound gives more dots
Bottom Up - draws lines from the bottom; more sound gives longer lines
Rectangle - shows concentric rectangles; more sound gives larger rectangles
Circle - similar to a pie chart with two sections; more sound increases the colored arc’s size
Wave Graph - similar to the Bottom Up mode, but is centered vertically

The Java application is terminated by sending it an HTTP request for this URL:

http://192.168.1.105:2014/quit

Again, replace the IP address above with the actual IP or hostname of the Raspberry Pi.

Here is a video of the project in action.