Keith Raper circuitry

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Keith Raper circuitry

Postby stefan1982 » Sat Dec 03, 2016 11:33 am

Anyone know a place where to buy project boxes with the KR-circuitry inside? I'm no expert at soldering and DIY electronics, so I would like to buy a few.
Anyone any idea?
Don't practice until you get it right. Practice until you can't get it wrong.
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Re: Keith Raper circuitry

Postby stefan1982 » Mon Dec 05, 2016 9:59 am

Or does anybody want to build a few, and sell them to me?
Don't practice until you get it right. Practice until you can't get it wrong.
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Re: Keith Raper circuitry

Postby ignotus » Mon Dec 05, 2016 11:03 am

I'm about 99% sure that those who tried this circuit couldn't really get it to work reliably with Megadrum - it was intended to work with Yamaha modules and does seem to be useful for specific cases with that, but as far as I can recall people gave up on it. What were you looking to do with it?
If it ain't broken... fix it until it is.
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Re: Keith Raper circuitry

Postby stefan1982 » Mon Dec 05, 2016 11:11 am

bell/bow separation without all the hassle of having to create separate bells and all that, for my ride cymbal...
Don't practice until you get it right. Practice until you can't get it wrong.
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Re: Keith Raper circuitry

Postby ignotus » Mon Dec 05, 2016 11:26 am

Did you try just using 2 piezos? I got quite reliable separation doing it that way.
If it ain't broken... fix it until it is.
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Re: Keith Raper circuitry

Postby stefan1982 » Mon Dec 05, 2016 11:33 am

Jes I tried, but without a good result. Could be the placement of the piezo's though...

How did you positioned your piezo's?
Don't practice until you get it right. Practice until you can't get it wrong.
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Re: Keith Raper circuitry

Postby ignotus » Mon Dec 05, 2016 11:42 am

One smaller 15 mm piezo inside the bell and a 27 mm one positioned more or less in the middle of the bow, slightly towards the edge. Pots or trimmers on the piezos would help too (much easier than a Raper circuit), to make one piezo cooler than the other (if one keeps insisting on triggering instead of the other, you cool it down a little). Then, you put them in the same xtalk group, crank xtalk up on both, and then do the usual with threshold, etc. Worked very well for me.
If it ain't broken... fix it until it is.
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