Australian/New Zealand Luthiers Forum

James, I haven't got the books with me at the moment so I can't check but my recollection is that the point where you hold the board to generate the cross grain vibration is further from the edge of the board than indicated by your marks. I may be wrong but it's worth checking the books. Hey Woodsy...

James, What wood are you testing? Ive got a library of tap tests on Swiss, Engleman and Sitka tops in my stash so should be able to pull up a screenshot of what you should be looking for. Also what hardware are you using? (ie mic, pre-amp? etc). Thanks for the help, guys. This is redwood, and I'm u...

Cross is where I run into trouble. There isn't an obvious peak that jumps out as the leader. It seems like it could be 50-ish, 125-ish, or 175-ish. The clearest audio results were when I held it in positions 5 and 6, which correspond best with where that node should be as pictured in the book (Buil...

Long has also been straightforward. I get a clear tap, and clear results on the graph. I'm confident saying the long grain on this is 47hz. In the recording, the tapping results seem best in positions 1-5. Positions 1-3 located right around where they should be as seen in the book (Build pg. 6-7). ...

Twisting has always been easy. This one is clearly 57hz.

Audio clip on SoundCloud

I got a little thorough with this. I wanted you to be able to hear what I'm hearing as I work down the "line" between the Long and Cross nodes. Long Grain and Twisting have always been easy. It's the Cross Grain that I have trouble discerning, which is why I'm thankful this thread was here. I took a...

The first time I bought Design, it went right over my head and I sold my copy. After picking it up a second time, I took a morning to sit down in the coffee shop with a yellow pad and pen, and wrote down my take-aways from each chapter. After coming back to them a few times, the basics are committed...

Doug, it's nice to meet you. I'm in Fresno. I'll go grab a top and do some taps in Audacity. I'll screen shot my results and post them within an hour.

I'm glad to have found this thread. When I was practicing with all of my tops a few months ago, I wasn't getting any difference between the Long and Cross grain frequency results. I inched the point where I held the tops down bit by bit from the long grain until I basically got to the middle of the ...