Mr Black double tracker

[caspercody]

Hello

I am looking for any information on what they use in this pedal? Is it analog, FV1, Daisy seed, or something else?

Thanks
Rob

 

[Robert]

Fairly certain it's FV-1.

 

[jwin615]

Oh shit. Robert replied.
All that's left to do now is...
Jack Deville!
Jack Deville!
Jack Deviuuuuhhhhh....

Not today Satan!

 

[Robert]

Oh shit.

Well, I was going to say... we could just ask.

 

[caspercody]

I did send an email asking…..

 

[Nostradoomus]

Well, I was going to say... we could just ask.

It’s something so original you couldn’t even comprehend it, tracer. *sips whiskey in a car from the 50s*

 

[Nostradoomus]

I’m talking 54 layer PCBs. One for each component. Straight jive.

 

[caspercody]

I never heard back from my email sent to Mr Black.

Wondering though if there is an analog circuit for changing pitch to get the detune effect?

I would like to try and add some type of analog circuit like this into a MN3007 short delay circuit I already have.

 

[D.M.N.]

I never heard back from my email sent to Mr Black.

Wondering though if there is an analog circuit for changing pitch to get the detune effect?

I would like to try and add some type of analog circuit like this into a MN3007 short delay circuit I already have.

I've been working up a schematic for a double-tracking ish analog circuit. Electric Druid has a circuit emulating the EHX Slapback and calculations for setting the delay time of the PT2399 via resistors, and using those equations, I added a rotary to switch between resistors for short delay times. I also incorporated the pin 6 hack to prevent the PT2399 from locking up on start, as well as some modulation on the signal. After the delay is generated, but before the signals are mixed back together, I inserted a distortion or fuzz just to muck with the 2nd guitar line. Haven't had a chance to breadboard it or test it though, so no idea if it would work, but I want to get back to it at some point.

 

[temol]

Here's double tracker project with modulation feature.

 

[Aleph Null]

I never heard back from my email sent to Mr Black.

Wondering though if there is an analog circuit for changing pitch to get the detune effect?

I would like to try and add some type of analog circuit like this into a MN3007 short delay circuit I already have.

I solved this problem for myself with this design. Sounds like @D.M.N. is following a similar line of development.

I have extra PCBs, if you want one. There's also a vero layout and Storyboardist did a perf layout.

 

[caspercody]

Thanks everyone!!

D.M.N - I did see that one, I actually bought Electric Druid Stompflo and Tapflo chips and trying different chips to get me slow delay times. I have a MN3007 circuit with 4047 and 8 way switch to switch between different cap sizes, PT2396 chip circuit working just trying to figure out a way to add modulation, and a ES56028 circuit built but not working yet.

Temol- I did make that project and uploaded a vero layout I created for the project. It was nice but something missing for me.

Aleph - that is nice just trying to get slower delays than the PT2399 will allow. Only down to 30ms for that chip.

How does the detune work? That is what I am trying to find, a add on circuit to detune.

 

[Aleph Null]

Aleph - that is nice just trying to get slower delays than the PT2399 will allow. Only down to 30ms for that chip.

How does the detune work? That is what I am trying to find, a add on circuit to detune.

The short answer is it's an envelope detector connected to the delay time.

The long answer is that the CCO voltage on pin 8 of the PT2399 is inversely proportional to the input volume. This can be used to apply voltage to the base of a BJT. Pin 6 is connected at the collector and the emmiter is connected to ground. When the voltage at the base is high (when the signal is quiet), current flows from pin 6 to ground. When the voltage at the base drops (signal is loud), the current flow from pin 6 is reduced (the BJT is working like a resistor), increasing the delay time and dropping the pitch of the delay signal.

The envelope pitch bending is a way to get quasi random pitch fluctuations without needing some convoluted LFO or a microcontroller.

 

[Feral Feline]

A month or so ago I was playing with my own Slap-Back delay ideas, some based on a VFE delay;
re-jiggered some things on Electric Druid's EHX-Alike that I didn't like;
and then a friend shot my ideas down, without understanding the constraints/limitations of the PT2399.

No matter, my ideas are sound.

Nonetheless, my foray into this area is bambino-esque compared to the other posters in the thread.