Tuesday, December 7, 2010

Fretless Acoustic Guitar

Family heirlooms. My brother gets the '28 Ford sedan with suicide doors. I got this guitar. (they were both in equal states of complete disrepair) 

The body is cracked, and someone tried to strip the finish before I got to it. The neck is bent too much to properly operate, and the bridge was providing a generous quarter-inch of extra room on top. 
So the frets were pulled and filled with MicroLite, then sanded smooth with 200-grit polishing pads. I took the old bridge out back and shot it. Had some tuning heads laying around (who doesn't) and strung it back up with the lower four of a D'Addario flatwound set, .056-.026W.



The new bridge is a block of walnut with .0625" rubber pads between the strings and body. The pad between the body keeps the bridge from sliding around and softens the sound of attack. 

Tuned 2/1 to a viola, C4, G4, D5, A5.


Recording the ShopBot

We set up a Zoom recorder with an XY m/s canceling mic to record the surfacing path of the CIF's ShopBot. The machine runs the perimeter of the table and planes it level. The cut noise is a bit erratic, occurring only when the bit catches a high spot. The router noise remains constant, but has an approach and decay from the mic position.
I was hoping for a bit of a doppler effect, but that might be achieved by putting some condensers at opposite ends of the table and panning them hard left and right to the capture device.