[ATM] whale song

[Jim Burrows]

At 2007-12-29 16:21 -0500, Bill Prewitt wrote:

>I've been down here in the basement listening to my polishing machine
>working on the 30" for the last week. Now that its down to slowly
>removing pits from a smooth surface, the lap is singing its heart out. I
>recorded a few bars, filtered out the motor hum, and uploaded it.

I got some sounds - not like that, but the usual polishing squeaks 
plus an unusual low pitched hum - in a slightly <g> different 
situation, figuring a 4 1/4" RC cass secondary on a pottery wheel 
using a starlap.  The mirror surface came out surprisingly 
asymmetric, lots of tetrafoil.  When you get beyond simple polishing 
into figuring, I'd suggest some sort of 2D test to see if the whale 
sounds are doing that.

         -- Jim Burrows
         -- http://home.earthlink.net/~burrjaw
         -- mailto:burrjaw at earthlink.net
         -- Seattle N47.4723 W122.3662 (WGS84)