It is possible to distort only highs and keep the basses almost clean in a TS?

[gigimarga]

Hello,

I'm asking from a couple of days if it's possible to distort only the highs or only the basses and to keep the rest of frequencies as clean as possible in a simple distortion stompbox like TS or MXR Distortion+.

Thx a lot!

[Dragonfly]

add a clean blend like in the sparkle drive


use a hi pass filter to the ts section

[gigimarga]

Thx for your answer!

Can you be more explicit, because i didn't understand what to do

[BubbaKahuna]

Isn't this exactly what a Rangemaster does?

[Dragonfly]

input goes to a blend circuit... search function will show you some options...from the blend circuit, one side goes clean...the other side goes to a high pass filter and then into the TS circuit. The high pass filter keeps bass / mid / unwanted frequencies from being distorted.

[gigimarga]

Thx a lot all!!

I will build a Voodoo Sparkle Drive as soon as possible.
Now the question is "It's possible to switch between distorsed highs and not distorsed basses to distorsed basses and not distorsed highs in an easy way?".

Thx again!

[Solidhex]

Ha

  Dragonfly's response is exactly what I would have said.

--Brad

[MartyMart]

ROG Splitter/blender would be useful, then you can apply the blend to various pedals and see
how you like it.
www.runoffgroove.com

Marty.

[Mark Hammer]

I posted something on my photobucket page (which they have filtered out here at work so I can't provide a link) that I called a "Flexidrive".  It is essentially a pair of Distortion+ circuts, one with a highpass filter ahead of it, and one with a lowpass filter.  A single pot sets the gain of each in complementary fashion (more gain for the high part means less gain for the low part, and vice versa), and a balance pot sets the blend of the two sections.  This would let you set the low-pass portion for relatively clean gain with the highpass portion set for high gain and clipping, but also let you dial in the contribution of the highpass part to the background so that clean bottom is the more prominent part of the output signal.

Send me a PM with your e-mail address and I'll send you the schem.  I noticed some omissions in the first version, but if corrected, as in the 2nd version the circuit should work fine.  Requires a quad op-amp or a pair of duals and 3 pots (probably 2 100k linear for gain and balance and one 100k log for output).  No exotic parts needed.

[DougH]

Hello,

I'm asking from a couple of days if it's possible to distort only the highs or only the basses and to keep the rest of frequencies as clean as possible in a simple distortion stompbox like TS or MXR Distortion+.

Thx a lot!

This is pretty much the recipe for "good distortion" in a lot of pedals and amps. Cut the lows before distorting. R.G. may have an article about this sort of thing on his site.

[Dragonfly]

BTW...if you build it, I would suggest using a "variable" bandpass / hi-pass filter...that way you can "tune" the overdrive for any guitar and amp setup.

[eurekaiv]

Am I mistaken or is this not what the cap and resistor to ground off of the clipping diodes in a Tube Screamer is attempting to do?  It doesn't stop clipping at below one specific frequency but instead creates a curve at which frequencies below a certain point are clipped less and less.  In the case of the stock TS it's 720Hz according to R.G. Keens Technology of the Tube Screamer article on geofex.com.

[Gus]

http://www.aronnelson.com/gallery/main.php/v/gus/plus.GIF.html?g2_imageViewsIndex=1

look down to the right for some reason it opens bigger than the screen on my PC

From a thread I thought people might build on

A rangemaster is more of a highpass being more a simple RC.  Source(guitar etc) into a C(input cap you change to taste) and the input R(The parallel combination of the two bias resistors and the input resistance of the Base)

Do a search here for some of the terms used in the thread and even at the old ampage site

[Dragonfly]

http://www.aronnelson.com/gallery/main.php/v/gus/plus.GIF.html?g2_imageViewsIndex=1

look down to the right for some reason it opens bigger than the screen on my PC

From a thread I thought people might build on

A rangemaster is more of a highpass being more a simple RC.  Source(guitar etc) into a C(input cap you change to taste) and the input R(The parallel combination of the two bias resistors and the input resistance of the Base)

Do a search here for some of the terms used in the thread and even at the old ampage site

Gus -

I hope you don't mind that I re-sized, rotated,  and posted the image you linked. If you do, let me know and I'll delete it.

It has a few really nice ideas that apply well to this thread, including a nice, simple hi pass filter.

[gigimarga]

WOOOW...so much ideas...THANK YOU VERY MUCH ALL!!!
Unfortunately, i can't test them in the next 2-3 days, but the weekend will be dedicated to them!

For Dragonfly: where i must to put the variable filter in the VDL Sparkle Drive and where i can find a schematic for it?

Thx again all!

[Dragonfly]

For Dragonfly: where i must to put the variable filter in the VDL Sparkle Drive and where i can find a schematic for it?

Thx again all!

just before the clipping section.

look at Gus' schematic for an example of a nice simple hi-pass filter

the rest is up to you...time to experiment and learn

[gigimarga]

Thx a lot Dragonfly!

Where i can find some good examples of variable filters?
I ask you that because i want to have 3 possibilities:

1. the signal with frequency below x Hz to be distorsed and the rest - no
2. the signal with frequency above x Hz to be distorsed and the rest - no
3. the signal with frequency between x and y Hz to be distorsed and the rest - no

[Dragonfly]

Thx a lot Dragonfly!

Where i can find some good examples of variable filters?
I ask you that because i want to have 3 possibilities:

1. the signal with frequency below x Hz to be distorsed and the rest - no
2. the signal with frequency above x Hz to be distorsed and the rest - no
3. the signal with frequency between x and y Hz to be distorsed and the rest - no

I'm gonna quote my post just above yours....

the rest is up to you...time to experiment and learn

At this point I leave it up to you to do the research...otherwise its us "designing" the circuit FOR you. Take this opportunity to learn. I guarantee that if you type "hi-pass filter" into the search forum here or google that you'll find plenty of examples. Let us know how things are going

[WGTP]

As Doug said, that is sort of a standard formula.  For a TS, reduce the input cap until it starts sounding thin and then instead of using the second op amp for the tone control, use it for a bass boost section.  Prior to the bass boost, add a SWTC for the tone control.  Other tweaks will probably be needed.  This won't get totally clean bass, but it should be significantly less distorted than the Treble.   

[gigimarga]

Thx a lot!