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<x-flowed>(jim adney) >While it's probably not as interesting, I think the most useful sounds >would >come from a contact microphone. Yes good idea. With a contact mike, things should be pretty reproducible, especially if all cars are squares or all are fasties, etc. Experienced people such as many of you on the list can hear problems, and I bet a microphone, when arranged properly, can as well. (brian castle) >And then it would need to be pretty >good quality, like a nice mic going to a DAT or even better, and 96K >sound >card on a good PC. OK, that would do it, I suppose. Many of us probably have access to a computer (given that we are using this list). Is a "standard" sound card not up to the task? What would be a nice mike? I would guess that one could be obtained with a suitable driver to do analog-to-digital conversion and the signal would show up as a file on your computer. Probably even comes with code to transform the signal into the frequency domian. Actually, this must be essentially how a knock sensor works on modern cars, but maybe over a more limited frequency band? well even if it won't work I still want to try. If you see a strange looking guy wanting to record your engine at parma, its probably me. Jim Rustad 71 FI Square Kennewick WA _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com ------------------------------------------------------------------- Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe </x-flowed>