EH double track effect. How to achieve in small clone and Clone Theory.

[nelson]

As I understand it, this effect is simply a chorus without modulation.


How would I go about creating a double track workalike from, say my small clone clone, or my Clone theory clone?

Surely its rather simple, to get the LFO to stop oscilating and leave the delay only. I wish I knew how.

I think it would be a worthwhile mod to these builds.

And it would stop me buying an MN3005 to build the actual EH unit.

I have the effect already on a Polychorus, and I like how it "thickens" the sound without changing pitch.

I also want to add this mod to the Clone theory layout I have here

http://topopiccione.atspace.com/pjimages/EHCloneTheory_new.pdf

Looking at the clocking for the EH double track, I could probably use a 3PDT toggle to switch the LFO of the Clone theory out, and the clocking circuit of the Double track in, before pin 1,2 + 3 of the CD4047.

Double track clock.








Clone Theory Clock and LFO.









This effect would be better controlled on the clone theory, as it already has an inbuilt "blend" (chorus/vibrato) control, like the original Double track.
The Double track clock is set up to clock an MN3005, and the Clone theory clock an MN3007. I dont need the slightly longer delay times of the MN3005.
I figure I would just have to tweak the 6K8 resistor in order to change the clocking frequency of the double track clock. In order to get the right range of clocking frequencies?

I dont think this is the most effective way to do it though. The Double track clock works from 12.5v. whereas the Clone theory 15v, wouldnt make alot of diff. I have a feeling there is a simpler way to do it, I just dont know how.

Does anyone have any ideas?

Thanks

[Mecca-Random-PieMan!!!]

http://www.diystompboxes.com/smfforum/index.php?topic=40280.0 help me!!

[nelson]

http://www.diystompboxes.com/smfforum/index.php?topic=40280.0 help me!!

Sorry man, thats really rude.

Be patient, people will get round to answering your question.

It wont be me though.

[markphaser]

The double tracking effect in a polychorus?

Do u have the EH polychorus/echoflanger/polyflange Schematics?

The polychorus/echoflanger/polyflange have different revision add ons so the double tracking might be different

[nelson]

The double tracking effect in a polychorus?

Do u have the EH polychorus/echoflanger/polyflange Schematics?

The polychorus/echoflanger/polyflange have different revision add ons so the double tracking might be different

I actually own a polychorus, and the differences between it and the echoflanger are pretty minimal. Diff board layout, and a few part subs.


I have the schematics.

I actually did a layout for the echoflanger. Search.

The only thing left to do is redraw page 2 of the schematic in the project file, the rest is finished.

[markphaser]

post the schematic so we can see the clock frequency and LFO circuit to understand the double tracking effect

[nelson]

post the schematic so we can see the clock frequency and LFO circuit to understand the double tracking effect

I think the post of the double track clock is enough.

If you really want the echoflanger schematic, search for it, took me years to find the schematic, and a long time to complete the layout. It is available on this forum, I know, because I am hosting it.

The least you can do is input a search string.

Plus, the original schematic is hard to read, very large and would make this thread harder to view.

[Mecca-Random-PieMan!!!]

  im sorry about earlier mate, i didn't mean to sound like a git

[Processaurus]

Hey Nelson, I think there is an easier way to do what you're thinking of, at least for the small clone.  I think its possible with just a spdt toggle switch.  I have a couple small clones "on the bench" so to speak, and have tried diddling with the LFO, like disconnecting the LFO from the 39K resistor before the CD4047 clock and have had success applying external LFOs, with a ~2v DC bias on them.  Anyway, if you've installed a depth knob, you could just put the common on the end of the depth pot (where the LFO comes in) and switch between the LFO and a constant voltage.  The full LFO (measured from the top of the depth pot) goes between 2.77v and .82v.  So make a constant voltage of ~2.77v with a voltage divider, and when the switch is connected to it, the depth knob will control your double track effect.  If somebody reads this better versed in integrator type LFOs, they could probably suggest a way to just stop the LFO with it left in a high state, and that would accomplish the same thing.

Make sense?

It may be more effective to switch the timing cap in the 4047 at the same time, to give a longer maximum delay (a la moosapotamus rotary switch mod for the SC).  If you do, make the two caps in series, with the smaller one getting shorted when you switch on the double track, leaving the larger capacitor as what the clock sees.   There shouldn't a pop when switching then.


All this is totally untested, by the way.

One interesting thing I found putting different LFOs into the small clone is that a vibrato (dry signal lifted) sounds much better with a sine wave, because the pitch doesn't change so abruptly.  A square wave LFO sounded lame, with both chorus and vibrato.  A well filtered envelope signal might sound interesting... I've never heard an envelope controlled chorus.

[markphaser]

So to get the double tracking effect

1.) disconnect the LFO with a constant voltage of  ?
2.) Change the Clock cap with a new value of ?

Double tracking seems like a manual parameter on a EH flanger or bad stone phaser

[nelson]

Hey Nelson, I think there is an easier way to do what you're thinking of, at least for the small clone.  I think its possible with just a spdt toggle switch.  I have a couple small clones "on the bench" so to speak, and have tried diddling with the LFO, like disconnecting the LFO from the 39K resistor before the CD4047 clock and have had success applying external LFOs, with a ~2v DC bias on them.  Anyway, if you've installed a depth knob, you could just put the common on the end of the depth pot (where the LFO comes in) and switch between the LFO and a constant voltage.  The full LFO (measured from the top of the depth pot) goes between 2.77v and .82v.  So make a constant voltage of ~2.77v with a voltage divider, and when the switch is connected to it, the depth knob will control your double track effect.  If somebody reads this better versed in integrator type LFOs, they could probably suggest a way to just stop the LFO with it left in a high state, and that would accomplish the same thing.

Make sense?

It may be more effective to switch the timing cap in the 4047 at the same time, to give a longer maximum delay (a la moosapotamus rotary switch mod for the SC).  If you do, make the two caps in series, with the smaller one getting shorted when you switch on the double track, leaving the larger capacitor as what the clock sees.   There shouldn't a pop when switching then.


All this is totally untested, by the way.

One interesting thing I found putting different LFOs into the small clone is that a vibrato (dry signal lifted) sounds much better with a sine wave, because the pitch doesn't change so abruptly.  A square wave LFO sounded lame, with both chorus and vibrato.  A well filtered envelope signal might sound interesting... I've never heard an envelope controlled chorus.

Thanks, this was the answer I was looking for. However, replacing the resistor going to pin 3 of the CD4047 with a pot would achieve the same effect as switching caps in and out. Altering the maximum delay, on a more tweakable level. Instead of presets.

Now I just need to work out the voltages coming out of the depth pot on the Clone theory and I can go from there.

Again, Thanks.

[A.S.P.]

you can do nice "ADT" and even "triple tracking" with the Flanger Hoax, too.
also nice: "animated DT", similar to "double tracked vibrato"...  (slow LFO rate!)

[markphaser]

whats animated DT?

[troubledtom]

whats animated DT?

double track or delay time ? maybe.
         -tt

[A.S.P.]

closely related to "barberpole vibe-ing"...

[nelson]

you can do nice "ADT" and even "triple tracking" with the Flanger Hoax, too.
also nice: "animated DT", similar to "double tracked vibrato"...  (slow LFO rate!)

Animated Double track. (mild vibrato, delayed unmodulated and clean?)

Great plugs, JUST TELL ME HOW TOO! Feel free to PM.

Merry Xmas Ton.


I am stuck out in the sticks with family jus now, will report when I get round too modding my Clone theory with this, will also update the Clone Theory project file with this mod (when its succesful) and the stereo mod, both with layouts. Got to be a little diff to the small clone 

[markphaser]

Whats barberpole vibrato?

[A.S.P.]

kind of "infinite celeste"...

[markphaser]

What sets the double tracking? is it just the Clock cap?

Whats the voltages for the manual parameter for the double tracking?