Finally I got a cable to connect my stackmat to my computer. It's a 3.5mm male to 2.5mm male audio cable I bought from DealExtreme for $0.97 with free shipping.
It works with CalCubeTimer, but I can't help it, I have to do it myself as well. It doesn't hurt to have two independent implementations, and I have some further developments in mind. So far I have StackmatViewer, a program in two parts, recording and viewing/playing. Here are two screenshots of the viewing part:
I haven't seen good visualizations of the signal like this yet, maybe others find this interesting as well. Or it could be used to diagnose problems.
How to use it:
- Connect your stackmat to your computer's microphone jack.
- Turn your stackmat on.
- Execute Recorder.jar, this records five seconds of sound data and stores it in the file "sound.dat".
- Execute Viewer.jar or Player.jar, this displays or plays the recorded sound data.
More information about the signal: