finebyfine
Well-known member
You could also use the unused op amp to buffer the VR rail or to implement an active tone filter
Curds and whey distortion added to a better overdrive?
- Thread starter neiltheseal
- Start date
Silver Blues
Well-known member
Watching this, seems like a great idea!
drgonzo1969
Well-known member
I wonder what @Chuck D. Bones & @Robert thinks about this idea?
neiltheseal
Well-known member
Would that look like this? From a different circuit but I think this is what you mean
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finebyfine
Well-known member
Yup!
DGWVI
Well-known member
This - I'd recommend a Sallen-Key type LPF, the Prunes loves heavily low passed signals.
It also loves being driven by suboctaves
I'm curious to see/ hear the results with the Timmy front end, but I've a feeling it'll be kinda underwhelming. It's neither filtered heavily or particularly harmonically rich enough, in my opinion
xefned
Well-known member
Watching closely! Hoping for success.
I wasn't gonna say anything for fear of being negative, but DGWVI is reading my mind. Isn't the Timmy the epitome of transparent / bordering on meh? I feel like the Oasis would be infinitely more interesting, but also much more complex. Either way, I hope your experiment is a huge success. It will open up a world of possibilities!
I wasn't gonna say anything for fear of being negative, but DGWVI is reading my mind. Isn't the Timmy the epitome of transparent / bordering on meh? I feel like the Oasis would be infinitely more interesting, but also much more complex. Either way, I hope your experiment is a huge success. It will open up a world of possibilities!
Mentaltossflycoon
Well-known member
I'm hoping this accidently evolves into an octave prunes of some kind.
neiltheseal
Well-known member
Thanks. Do you have an example of the Salem key in action? Or know how i might implement it here? I’m a bit of an amateur with theory.
Open to other overdrive ideas if you have any? Timmy was chosen mostly because it’s simple.
DGWVI
Well-known member
Off the top of my head, the Op-amp Big Muff uses one pre-clipping for that warmer fuzz texture, and the Octarock uses a few at various points to aid in tracking
Personally, I'm a fan of the dirt in the Prunes, but a heavier fuzz would do well. You could try clipping diodes on the feedback loop and/or to ground for some different textures
The op-amp Muff would be a good start, or something else with a strong attack and shortened decay like the FY-2 would work well
neiltheseal
Well-known member
I love the fuzz/op amp big muff idea!
I think I will stop tinkering with the idea and just bite the bullet. As long as it works I will be happy even if the Timmy isn’t interesting.
If successful I might look into a more appropriate overdrive or a fuzz like you suggested. Probably the fuzz!
I think I will stop tinkering with the idea and just bite the bullet. As long as it works I will be happy even if the Timmy isn’t interesting.
If successful I might look into a more appropriate overdrive or a fuzz like you suggested. Probably the fuzz!
That is awesome. I kind of want to take that circuit and throw it in a stompbox. I’m assuming I’d need some sort of charge pump or converter to get that +15 -15 v
Here’s the build docs, under Wavefolder:
DGWVI
Well-known member
For a quick mod, you can play with the value of C2. Increase it to something like 10n for some heavier filtering
Feral Feline
Well-known member
Cool!
Looking forward to seeing how this idea shakes out for you.
Sucky or not, I'd still attempt to breadboard it before expending money & time on a PCB layout; ideas like yours are the very reason breadboarding exists — tweak it 'til it works the way you want and then have a PCB made.
You could also audition the other suggested circuits and more using smaller daughter-breadboards — load up the P&C intermodulation on the main breadboard, and then the smaller breadboards could host the Timmy, the BMPOA, Dunes, etc.
Check out the JMK Panner, that might give you a place to stick that spare op-amp and from what I've read the Panner is a solid option for mixing the signals.
neiltheseal
Well-known member
Hello everyone. Some mixed success on this project. I put it together on the weekend and the Timmy section works. However the wave folder only works if I I have large amounts of signal going into it.
I have placed a Mutron 3 in front of my prunes and Timmy and this activates the wave folder quite well (I think an envelope filter with a wave folder would be a great future project actually).
I will try putting a boost before the diode network of the wave folder to see if I can get it to activate by itself.
Some success at least. I will also try using other more interesting circuits to engage the wave folder.
I have placed a Mutron 3 in front of my prunes and Timmy and this activates the wave folder quite well (I think an envelope filter with a wave folder would be a great future project actually).
I will try putting a boost before the diode network of the wave folder to see if I can get it to activate by itself.
Some success at least. I will also try using other more interesting circuits to engage the wave folder.
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jesuscrisp
Well-known member
Well the Timmy soft clips a signal that already has less voltage gain than the prunes and custard, of course it won't be as loud...
You might want to increase the amount of boost that the second stage of the Timmy adds.
Else how about trying with an LM386 for an input stage?
You might want to increase the amount of boost that the second stage of the Timmy adds.
Else how about trying with an LM386 for an input stage?
tegendemuur
Well-known member
Recognized the op-amp muff in the Downtown being similar toe the Timmy, though it doesn't include the cap for filtering. Would it be as simple as running one parallel with R26? There isn't much to tweak in this fuzz, it seems, but I get what I can to make it a bit more my own.
This effect including an octaver in the same circuit as the op-amp muff, might be of interest to others as well, as I suspect its tweaked to take low end like a champ, as bassist use this pedal as well.
Built documentation, which might be of interest: https://drive.google.com/file/d/1LupjSSG5nm0bJQmdsELjdwb2XpmEELHs/view?usp=sharing
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jesuscrisp
Well-known member
It is in fact very different...
neiltheseal
Well-known member
Yes I’m realising that now. I didn’t realise the Timmy was low gain. I tried to do some calculations but I was obviously off.
Do you mean I should increase the amount of boost in the first stage or f the Timmy? I’m not sure how boosting the second would affect the wave folder? Sorry if a silly question.
Lm386 input is a good idea. I might try that
jesuscrisp
Well-known member
For some reason I thought you had the entirety of the Timmy going into the wavefolder, also misread the amount of voltage gain from the prunes and custard, damn... But anyway, the soft clipping takes away a good bit of volume.
Increasing the gain of the Timmy clipping stage won't get it much louder, just more distorted and give you more clean bleed through. You could try swapping the dual pairs of silicon diodes for a single pair of LEDs in the Timmy gain stage and using a log 1M gain pot instead of the 500K.
Outside of that, your mixing stage is kind of a mess. Either do a dedicated mixing stage (inverting topology as in the screenshot you provided) and THEN the tone control and boost stage, or just do the entirety of the Timmy circuit before the split to wavefolder and OD only. Or just add a tone control after the mixing stage without the additional second half of the Timmy. As is you're trying to do the mixing with a Rat style tone control in series which just screams unintentional interactions with the mix pot and you already have quite a big treble cut just from the 15K series resistors going to the LPF cap.
