Search found 16 matches

by Alain Lambert
Wed Sep 21, 2022 8:57 am
Forum: Instrument Builders Forum
Topic: Back brace position
Replies: 6
Views: 6106

Re: Back brace position

In my last Ukulele build, I tried positioning the back braces on the nodes of the back (the free back plate that is) thinking that these nodes do not vibrate and so would be a good place for a brace. I could not detect any improvement in volume.
by Alain Lambert
Sat Jan 22, 2022 9:38 am
Forum: Instrument Builders Forum
Topic: Resawing, Bandsaw drift etc
Replies: 10
Views: 9610

Re: Resawing, Bandsaw drift etc

This is what I use for a re-saw fence. A short rounded square. You can adjust the piece if the cut want to drift.
by Alain Lambert
Fri Feb 19, 2021 2:47 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Guitar one frequency
Replies: 7
Views: 7362

Re: Guitar one frequency

if your current frequency is 50Hz, then the 47 peak is probably some noise from the current. Make sure you do not place your microphone on the same table as your computer or use some foam to isolate it.
by Alain Lambert
Sat Jan 30, 2021 8:13 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Intonation and Flamenco guitars
Replies: 4
Views: 5781

Re: Intonation and Flamenco guitars

I am no expert in compensation, but someone (don't remember who) mentioned something which I am still digesting. If you compensate the nut and you put a capo on a fret, the total length of the string is still shorter compared to a non compensated. So the nut compensation will make a difference with ...
by Alain Lambert
Tue Nov 17, 2020 1:41 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Spectrum Analyser
Replies: 5
Views: 11082

Re: Spectrum Analyser

LSA is now at version 1.7. Also there is now a Linux version as well. You can find the versions here: Windows: https://drive.google.com/drive/folders/1X4FSJKr_xdisqzpeUNJYVBuAeHgzvdnP?usp=sharing MacOS: https://drive.google.com/drive/folders/1oGqALjZbIEzcvmBvFxp87wma6DI_mu6z?usp=sharing Linux: https...
by Alain Lambert
Tue Sep 08, 2020 3:20 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Anyone able to have a quick check here???
Replies: 4
Views: 6304

Re: Anyone able to have a quick check here???

What I do is tap and record the back. It should confirm if 230 is the right peak for T(1,1)3. The back tap willl be close to the T(1,1)3
by Alain Lambert
Mon Jun 29, 2020 6:08 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Spectrum Analyser
Replies: 5
Views: 11082

Re: Spectrum Analyser

LSA is now available for Mac users. You can find a copy Here: https://drive.google.com/drive/folders/1oGqALjZbIEzcvmBvFxp87wma6DI_mu6z?usp=sharing Please consult the readme file for instructions. This has not been tested intensively, please report any problems. The windows version is still available...
by Alain Lambert
Wed May 06, 2020 12:18 am
Forum: Instrument Builders Forum
Topic: Help reading flamenco tap tone data
Replies: 12
Views: 21677

Re: Help reading flamenco tap tone data

I have no idea how a Flamenco spectrum should look. But based on your numbers and the back tap, I would say the T(1,1)3 is that little bump around 217 Hz. It look like the back is not contributing much to the top resonance.
by Alain Lambert
Tue May 05, 2020 4:54 am
Forum: Instrument Builders Forum
Topic: Help reading flamenco tap tone data
Replies: 12
Views: 21677

Re: Help reading flamenco tap tone data

If you record a tap of the back this will give you an aproximation of where the T(1,1)3 is.
by Alain Lambert
Mon Apr 27, 2020 10:50 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Monopole mobility for ukuleles?
Replies: 2
Views: 5312

Re: Monopole mobility for ukuleles?

If you like "science building" make sure you visit https://ukuleles.com/
by Alain Lambert
Tue Apr 21, 2020 9:05 am
Forum: Instrument Builders Forum
Topic: Newbie trying to shift frequencies
Replies: 5
Views: 5831

Re: Newbie trying to shift frequencies

I just did that recently on a 000. You need to reduce top stiffness. Your best bet is reducing the X brace height. Here is a spectrum of the original : 000 top.jpg The next chart show how it changed after 1, 2, 3, carving session of the braces. Notice that the air mode did not changed much as this i...
by Alain Lambert
Tue Apr 07, 2020 11:51 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: having a go at spectrums
Replies: 11
Views: 14332

Re: having a go at spectrums

You can try my software Luthier Spectrum Analyser (free Demo). It is already setup for luthier usage. There is a windows version here: https://drive.google.com/open?id=1X4FSJKr_xdisqzpeUNJYVBuAeHgzvdnP I have also a Mac version, but this is still a Beta version. It need more testing (looking for tes...
by Alain Lambert
Sat Dec 14, 2019 6:13 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Spectrum Analyser
Replies: 5
Views: 11082

Re: Spectrum Analyser

Update: I have made several additions/improovments to LSA. It now come with an installer , which may make things easier for some. The "sound shape" graph is now saved with the spectrum. The cursor now show the frequency in the status bar, the decay/duration can be measured with a left click, Etc. Yo...
by Alain Lambert
Wed Nov 13, 2019 1:12 am
Forum: Instrument Builders Forum
Topic: fretboard radiusing router bits
Replies: 18
Views: 22656

Re: fretboard radiusing router bits

56nortondomy wrote:
Tue Nov 12, 2019 4:49 pm
I'd like to see how you do it too Steve.
Wayne
+1
by Alain Lambert
Mon Apr 08, 2019 10:30 am
Forum: The Gallery
Topic: Blackheart Sassafras Tenor
Replies: 6
Views: 10510

Re: Blackheart Sassafras Tenor

Beautifull instrument, well done, congratulation.
This is a 14 frets to the body. Did you change the scale length or just moove the bridge?
by Alain Lambert
Fri Apr 06, 2018 2:44 am
Forum: Instrument Builders Forum
Topic: tone
Replies: 5
Views: 7104

Re: tone

Could be the bridge or the NUT or a bad string.
I would start with the nut. Make sure the string contact point is at the very edge of the front of the nut and not at the back.