Tube Amps / Music Electronics
|For current discussions, please visit Music Electronics Forum.|
|previous: Gus a ultra tube screamer could be a sc... -- 8/13/1999 4:44 PM|
|8/13/1999 5:23 PM|
|John Greene||Re: Ultra TS|
I've messed around with something similar. The key to smooth distortion seems to be ramping the frequency response low to high before clipping. Much like a tube amp does when power amp distortion is involved. High frequencies get clipped first. The problem with trying to emulate this with a pedal is that the signal is going to go through the preamp of the guitar amp which is going to highpass filter the signal again making it sound harsh. The common solution to this is to filter a lot of the highs out in the pedal before it goes through the amp.
I thought that if you could emulate the tone control stack of an amp before the clipper and then emulate the 'inverse' of the tone stack after the clipper, it would cancel the effect of the tone stack in the amp itself. This would leave a distorted signal at the power amp that more closely represents an overdriven amplifier. Depending on how well you implemented the clipping, of course.
Complications come in with emulating different 'inverse' tone stacks and allowing for different tone adjustments on the amp itself. Makes for a lot of knobs on the pedal.