Setup is a trash bag over my subwoofer (facing up), then paper on that. Add paint, water, and food coloring. The vibration mixes it fast!
Alternates - I had a terrible time choosing!
I used an app on my phone to generate the frequency -- typically 26-60 Hz gave the most interesting photos, and trying to catch it when it first starts is interesting also.
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Well done with this Jeff! and remember, you still owe me a portable cd/cassette player as you made me rip my speakers out ;)
We were neck and neck all week m8 and think your PP'ing let me slip into the lead at the last furlong ;) I look forward to watching your progress with this (rather messy) pursuit.