[78-L] Record Noises - Identify and Understand Cause

[neechevoneeznayou at gmail.com]

On 1/13/2014 10:24 AM, Doug Caldwell wrote:
> is there any way to visually tell if a record has "blasting"

If you mean by the naked eye, I think so. If your vision is strong 
enough, you could look at the groove and see that it appears to be 
"wider", meaning it produces a wider lateral movement for the stylus on 
peaks. Easier to see when comparing a pristine copy to a worn copy. Also 
easier when your eyes are young. Otherwise, a strong magnifier helps.

>> And if you look at blasting on a graph, it's a ton of spikes (like a
>> lotta ticks close together).

If you mean on the computer screen, David has answered that. The sound 
produced may include high frequency artifacts that get more intense on 
peaks. I am not sure what David means by a "graph". Perhaps a spectral 
display? This is amplitude and frequency as a function of time. Makes 
everything visible.

joe salerno