Oscilloscope fun

I belive this is some variation of rose (or rhodonea) curves.
Sound card is interfaced with oscilloscope in XY mode: left channel to X, right channel to Y. Software (audacity) generates 3 sinusoidal waves for left channel and same 3 waves shifted by +/- 90 degrees for right channel. Frequencies are: 60.1Hz (circle), 360Hz and 3000Hz (fine spiral) (I may be wrong about frequencies, it was a while ago). Rotation is caused by 0.1Hz added to 60Hz wave. Background music is Air - Les Profesionnels.
It is possible to create other drawings, all you need is invention :]

Category:

Science & Technology

Tags:

• oscilloscope
• lissajous
• xy
• fun
• science
• cycloid
• soundcard

[lancedulak]

What software did you use to generate the sound?

[argoneum]

@lancedulak Audacity.

[hanemagne]

@dammitdarrell Well, some scopes have a Z input, which lets you change the intensity of the beam. I'm not sure a harmonic signal would do it, though.

[dammitdarrell]

Wow this is really amazing. I wonder what this would look like on a 3 channel 3D oscilloscope if such a thing existed? Anyway I am glad i never had to graph this by hand during a math test.