It seems Java is not installed or disabled on your computer. You need to install and/or enable it for this website to work properly.
Since Java version 7u51, Java needs to be enabled separately for each website; see http://websdr.org/java.html for instructions.
Your browser does not seem to support HTML5 WebAudio; please try a recent version of Firefox, Chrome, Opera or Safari; or switch to Java.
Loading waterfalls app ...
Signal ? dB;
Peak ? dB;
Your browser does not seem to support downloading the recording; please try a recent version of Firefox, Chrome or Opera.