This java applet is a demonstration of digital filters. You should
hear a noise waveform when the applet starts up. If you get a message
"Need java 2 for sound", then you should get the
Java plug-in.
The applet starts up with a low-pass filter. It shows the frequency
response of the filter, the spectrum of the filtered waveform being
played, the waveform itself, and the impulse response of the filter.
Click on the response curve to change the cutoff frequency.
You can use the popup menus on the right to select another filter or
input file.
Full Directions.
The source.
More applets.
Zip archive of this applet.
Version 1.2, posted 9/15/05
Thanks to the JavaZOOM
team for the mp3 code.
Thanks to Digital Droo for
the Monkey Developers sample.
Thanks to Søren "Jeff" Lund for the Arabian Bias sample
(and also to the HVSC team and
Andreas Varga).
Thanks to Tory Esbensen for the speech sample.
Thanks to the MAME team (and Eugene
Jarvis and Larry Demar) for the
Robotron sample.
java@falstad.com