Earthquaker Devices - Rainbow Machine

culturejam · Post by **culturejam** » 16 May 2012, 00:38

I posted all this stuff earlier in the thread guys. Does anybody read threads?

teej212 · Post by **teej212** » 16 May 2012, 00:49

you seemed to think it was some sort of custom code that spin had to load onto the chip, from what I read.

culturejam · Post by **culturejam** » 16 May 2012, 01:51

culturejam wrote:It is also possible that the Rainbow Machine is doing it's funky magic with one of the default programs and some seriously wacky feedbacking mechanism. That would also make sense with the limited pitch shifting range, which is identical to the range in both of the default FV-1 pitch shift programs. The FV-1 itself is capable of generating more than an octave up and down if programmed to do so, and the default shifter programs are limited to a 4th below root and a 3rd above. And that's *exactly* the range of the Rainbow.

Sweetalk · Post by **Sweetalk** » 16 May 2012, 04:01

culturejam wrote:I posted all this stuff earlier in the thread guys. Does anybody read threads?

Don't be mad, off course I read it, I was just thinking out loud to figure out the effect and asking for some precise info to narrow posibilities. I don't have one here to open it up.

culturejam · Post by **culturejam** » 16 May 2012, 12:16

Please do think out loud, of course. I just feel like sometimes people read the title of the thread only and then post whatever is on their mind instead of reading the whole thread.

But anyway, maybe I've just gotten my knickers in a twist over nothing.

monkeyssj1 · Post by **monkeyssj1** » 16 May 2012, 15:31

it makes me happy seeing you pedal masters figure this thing out

keep it up. (not the fighting)

Sweetalk · Post by **Sweetalk** » 16 May 2012, 19:57

Well, I got some free minutes today and make some fast programming and got a rainbow-work-alike working. Still need a lot of work, but I haven't made all the hard, it's all soft.

Sweetalk · Post by **Sweetalk** » 16 May 2012, 22:24

Can someone check the CD4049 part of the circuit to check the clock frecuency that sweeps the tracking pot?

monkeyssj1 · Post by **monkeyssj1** » 21 May 2012, 20:41

how's it going with this thing?

Glass_Hero · Post by **Glass_Hero** » 26 Jun 2012, 17:55

i didnt read over this thread, i'm not concerned about cloneing this, its digitial and prolly programed to do what it does.. but i have one of these and i emailed the guy about the exp jack..

"It must be a trs type jack, the pitch exp is a cv input. The pot is wired like this:

1- gnd (sleeve)
2- pitch control (ring)
3- +3.3v (tip)

Use a moog exp pedal as an example.

Sorry had tip and sleeve reversed. Tip goes to wiper. Also, b1m pot is best."

So would the schem look like this but with a 3.3volt zener? and what values for the pots?

GuitarlCarl · Post by **GuitarlCarl** » 17 Dec 2012, 01:59

coldcraft · Post by **coldcraft** » 17 Dec 2012, 05:48

culturejam wrote:Well damn. I sure don't see an EEPROM anywhere. So that must mean that the FV-1 itself has the code loaded, which would be pretty expensive.

OR

It is also possible that the Rainbow Machine is doing it's funky magic with one of the default programs and some seriously wacky feedbacking mechanism. That would also make sense with the limited pitch shifting range, which is identical to the range in both of the default FV-1 pitch shift programs. The FV-1 itself is capable of generating more than an octave up and down if programmed to do so, and the default shifter programs are limited to a 4th below root and a 3rd above. And that's *exactly* the range of the Rainbow.

Another thing: I still don't see the crystal oscillator. So I'm thinking the CD4049 is set up as a clock pulse generator:

Pin 9/10 is supposed to have the crystal hooked up there. I see pin 9 runs down to the CD4049, so I guess that's part of the equation. And the Tracking pot ties in to the 4049 as well, so the clock rate must be adjustable. Pretty cool. The more I look at this, the more I'm thinking it uses one of the default FV-1 programs. Gonna review it some more.

here's an alternate oscillator using 3 inverters. Also, the version you posted could be used to make a variable oscillator no? maybe that's what they are doing in the rainbow machine, but could it also be used with the V1000M/AL3102? i seem to remember ryan from dr scientist knowing something about variable oscillators for driving the digital chips

Sonic · Post by **Sonic** » 07 Feb 2013, 18:36

I'm pretty sure I have figured this thing out, I have just ordered a bunch of FV-1 ICs, to test it out and build a couple of knock offs. It wont be exactly the same, but a similar sounding divice (I hope).

1: Program 3 on the chip is (on the right channel) a pitch shifter, yes you know that. On the left channel is a delay ("magic").
2: the pitch shifter has it's own "build in" or latancy delay if you will, with about 50 ms or so. That is looped back, as you would in a normal delay with a repeat/level knob, this will create the spaced out reverbs you get, pitching one or the other way, depending on where you put the pitch shifter knob.

It's a pretty easy pedal to mod, since you have 7 other programs build in and unused, such as reverb, tremolo, flanger etc.

Please tell me my theory is correct

teej212 · Post by **teej212** » 08 Feb 2013, 01:30

is the 'magic' switch not just a feedback loop connecting the input to the output?

Sonic · Post by **Sonic** » 08 Feb 2013, 12:23

teej212 wrote:is the 'magic' switch not just a feedback loop connecting the input to the output?

At 5:38 in the video the "Magic" button is turned off, and you can still hear the signal being regenerated, I still believe that the magic is the delay part of the left channel. But I might be wrong.

Ice-9 · Post by **Ice-9** » 09 Feb 2013, 10:09

Jack Deville wrote:Um...

Who tracked that board?
For serious. Take a close look at the tracking, component placement and massive copper pours.

And also, what's up with the aux. jumper at the top? It appears to be an omitted analog ground connection?

The layout reminds me of a lot of the Catalinbread pedals. Ugly but functional.

coldcraft · Post by **coldcraft** » 14 Feb 2013, 21:51

culturejam wrote: Another thing: I still don't see the crystal oscillator. So I'm thinking the CD4049 is set up as a clock pulse generator:

Pin 9/10 is supposed to have the crystal hooked up there. I see pin 9 runs down to the CD4049, so I guess that's part of the equation. And the Tracking pot ties in to the 4049 as well, so the clock rate must be adjustable. Pretty cool. The more I look at this, the more I'm thinking it uses one of the default FV-1 programs. Gonna review it some more.

after watching the prymaxe demo, I'm convinced that this is what is happening. it might be cool to use the other 4 invertors as an LFO to then modulate the Clock in other applications.

Korg · Post by **Korg** » 16 Jan 2014, 02:08

Hi everyone! I've just been reading this thread and... WOW!!

Has anyone got to further developments in this?

kroaton · Post by **kroaton** » 16 Nov 2014, 19:42

Anything new on this beast?

I just ordered some FV-1 chips and want to mess around with this.

Post by **modman** » 17 Nov 2014, 21:20

kroaton wrote:Anything new on this beast?
I just ordered some FV-1 chips and want to mess around with this.

Korg wrote:Hi everyone! I've just been reading this thread and... WOW!! Has anyone got to further developments in this?

1. Read the thread again
2. Google your ass off...
3. Experiment yourself
4. Then come back and contribute whatever you've found.