The Hub

I did a pretty big update to my web tools last week. These are updated from the older versions I had up on celestialinstruments.com. There’s an updated FFT tool now, plus mode detection for guitars and plates, wolf note detection, played-note energy transfer, monopole mobility, plate thickness calculation, and 1/2/3/4 DOF modeling that can be prefilled from FFT data. The part I’m most excited about is being able to fit a measured guitar re…

A customer brought me a new Hummingbird with fret buzz a few weeks ago. After performing what may be the best levelling job I've ever done, the buzz was reduced, but still noticeable, though it sounded different than normal fret buzz. When I noticed that the sound was worst when playing F2 (on the A string or D string), I did a frequency analysis and discovered that the main top resonance was at 163.9 hz, and it all made sense. Those…

I have built a steel string guitar that has an annoying high pitched pulsing overtone. The guitar is an x-braced OM style with a thicker depth (more in line with a dreadnaught depth). I have built several of these that do not have the annoying overtone, so I don't think its the specific shape that is causing it. The overtone occurs when the note B2 is played on the G string, 4th fret. Interestingly, it does not occur when the open B stri…