[sdiy] tonal tilt

[John Mahoney]

There was a hi-fi preamp or integrated amp back in the 70s that had a 
unique tone control that may have been called "Tilt". You could set 
the tilt to flat, up, or down. It would change the tonal balance by 
*gently* changing the frequency balance.

Picture a frequency response graph. With flat response, the graph is 
a flat line. Now visualize a line that starts 1 db below flat at 20Hz 
and ends 1db above flat at 20kHz -- that is tilting it up; the 
response is now +2 db at 20kHz relative to 20Hz, but there are no 
peaks or dips in the frequency response.

A tilt control would be pretty neat for warming or thinning the tone. 
The concept is simple. I don't suppose that it's electronically 
simple, too. Thoughts?
--
john


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