To start, click "start". "stop" to stop recording. "clear" to clear the current recording. "play clip" will play the whole recording.

Scroll up and down on the oscilloscope viewer to zoom in and out on the waveform, and the time scale is shown at the bottom. You can alternately use the +/- buttons to zoom.

Scroll left and right on the viewer to scroll the data, or use the arrow buttons.

Enable "lock wave" to make the viewing window attempt to lock onto a waveform preventing it from sliding across the window.

Click and drag on the viewer to select a portion of the waveform. You can play the selection or loop it for 1 second by clicking the "play" or "loop 1s" buttons under the selection section. "loop" will loop the selection indefinitely.

Enjoy! :D