Post by Tony Done
<g> I think I could fix it if it was amplified, using EQ as you suggest,
but this is the acoustic sound that I'm trying to modify. One option I
just tried was reducing the soundhole size; I used a cd and bit of
sticky tape. The body of a guitar is a Helmholtz resonator, so making
the soundhole smaller lowers the air resonance pitch of the body - think
ocarina. The effect was promising, the hard bright edge was reduced. I
might make something prettier that includes a pickup or buy one of those
nice looking lute hole thingies.
Any other suggestion would be welcome though.
Oh, you are talking about a Hawaiian guitar. I wouldn't call that a "lap
steel". I'm not sure how to mellow that out. Reducing the sound hole size
does lower the note of the body which give a hint of a deeper tone but
really doesn't roll off the highs. I was recently playing around with
changing the sound hole size of a Fender acoustic guitar I was working
on. (bought it for $20 with some cracks that I glued). It doesn't change
the tone that much. The low notes sound deeper though.
You might try stuffing some fiberglass batting or cotton over the sound
hole but I think most of the brightness comes from the top. That means
what you really need to do is put some sort of rubber or absorbing
material between the bridge and the top to block highs. But on a normal
guitar the bridge is glued on the wood so that ain't gonna happen. Maybe
a rubber strip under the saddle if it uses one? Glue lead sheets to the
top of the guitar? I don't know. I'm just free-associating now! :-)