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"Seesaw" EQ

Started by Paul Marossy, April 23, 2018, 03:01:40 PM

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Paul Marossy

Anyone have info on how a "seesaw" EQ circuit works? I can't seem to find anything about it via Google.  :-\

FiveseveN

Quote from: R.G. on July 31, 2018, 10:34:30 PMDoes the circuit sound better when oriented to magnetic north under a pyramid?

Paul Marossy

Quote from: FiveseveN on April 23, 2018, 03:08:07 PM
Would that be the same as a "tilt" EQ?
http://sound.whsites.net/articles/eq.htm#s10

Probably. The description sounds like a secretive circuit which was demonstrated to me last night. Just wanted to learn a little more about how it works and what it is.

Rob Strand

#3
Check out this one maybe,




Actually it's the same as the ESP ckt .
Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.

Paul Marossy

Quote from: Rob Strand on April 23, 2018, 05:40:04 PM
Check out this one maybe,




Actually it's the same as the ESP ckt .

ESP circuit?

Mark Hammer


Rob Strand

QuoteESP circuit?
Just to spell it out, the sound.whsites.net site is Elliot Sound Products = ESP.
Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.

DIY Bass

I think this may be the first time ever that I have disagreed with Rod Elliot :-)

I have a control on one of my basses that I think functions a lot like this.  I must admit I keep it centred most of the time, but when I am looking for just a quick tone adjust it is quite handy, and the bass stays clean looking and easy to us with only a few knobs on it :-)  Not at all useless, but maybe best used sparingly.

Paul Marossy

#8
Quote from: Rob Strand on April 23, 2018, 07:27:04 PM
QuoteESP circuit?
Just to spell it out, the sound.whsites.net site is Elliot Sound Products = ESP.


Oh duh! *slaps forehead* I thought maybe you were talking about ESP Guitars, like some part of an active guitar pickup or something.

Anyway, I have a friend with a boutique pedal company and he's come up with a gadget that is an adjustable high pass filter combined with a tilt EQ, but he called it a seesaw. It's pretty cool... it can make a Strat sound like a Les Paul, and vice versa. I think it could have a lot of uses in the studio for sure. I might want to fool around with this idea just to amuse myself.

Rob Strand

QuoteOh duh! *slaps forehead* I thought maybe you were talking about ESP Guitars, like some part of an active guitar pickup or something.
It's a bit of a naming problem.  I guess I come across Elliot's pages more then ESP guitars.

QuoteIt's pretty cool... it can make a Strat sound like a Les Paul, and vice versa.
Yes it's a cool idea.

QuoteI think this may be the first time ever that I have disagreed with Rod Elliot :-)
Yeah, it's a good site.  He's done a great job.

The circuit I posted was actually out of a bass amplifier.
Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.

PRR

> I thought maybe you were talking about ESP Guitars

Great idea! "Play the notes I am thinking of, not the notes my fingers are on!"
  • SUPPORTER

Rob Strand

QuoteGreat idea! "Play the notes I am thinking of, not the notes my fingers are on!"
I knew you were going to say that.
Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.

deadastronaut

i just added that tilt EQ   to a cab sim....nice low end for chunky stuff, and great for bass too.

pretty cool. 8)
https://www.youtube.com/user/100roberthenry
https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

Rob Strand

Quotei just added that tilt EQ   to a cab sim....nice low end for chunky stuff, and great for bass too.
Cool idea.
Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.

samhay

I posted a design a couple of years ago that uses the tilt EQ. It is definitely more useful than Rod (ESP) gives it credit for, but his context may be different to ours.

The thread is here:
http://www.diystompboxes.com/smfforum/index.php?topic=112900.0

Figures are gone thanks to dropbox, so I will add what I can to the end of the thread.
I'm a refugee of the great dropbox purge of '17.
Project details (schematics, layouts, etc) are slowly being added here: http://samdump.wordpress.com

Paul Marossy

Quote from: deadastronaut on April 25, 2018, 04:18:52 AM
i just added that tilt EQ   to a cab sim....nice low end for chunky stuff, and great for bass too.

pretty cool. 8)

Interesting. That tilt EQ circuit is probably a lot more useful than ESP says it is, but in his eyes it probably has a very limited use which is why he bashes it.

ElectricDruid

Quote from: Paul Marossy on April 25, 2018, 09:52:06 AM
Quote from: deadastronaut on April 25, 2018, 04:18:52 AM
i just added that tilt EQ   to a cab sim....nice low end for chunky stuff, and great for bass too.

pretty cool. 8)

Interesting. That tilt EQ circuit is probably a lot more useful than ESP says it is, but in his eyes it probably has a very limited use which is why he bashes it.

Yeah, he's coming from a hi-fi audio angle, where the original signal is sacred and you shouldn't mess with it. All his EQ designs say things like "No-one *ever* needs more than 10dB of tone boost" and stuff as well. That's fine and probably true in the sense in which he means it, but it doesn't really apply on a stompbox forum where mangling the sound beyond all recognition is practically de rigueur!
His stuff is all robust, well-considered, and properly engineered though, and he's very explicit about the assumptions and biases that he makes, so it's a great resource to borrow from, even if you finish up tweaking the odd bit here or there. I'm a big fan. We could use more sites as good as the ESP audio pages.

Paul Marossy

Quote from: ElectricDruid on April 25, 2018, 11:22:06 AM
Quote from: Paul Marossy on April 25, 2018, 09:52:06 AM
Quote from: deadastronaut on April 25, 2018, 04:18:52 AM
i just added that tilt EQ   to a cab sim....nice low end for chunky stuff, and great for bass too.

pretty cool. 8)

Interesting. That tilt EQ circuit is probably a lot more useful than ESP says it is, but in his eyes it probably has a very limited use which is why he bashes it.

Yeah, he's coming from a hi-fi audio angle, where the original signal is sacred and you shouldn't mess with it. All his EQ designs say things like "No-one *ever* needs more than 10dB of tone boost" and stuff as well. That's fine and probably true in the sense in which he means it, but it doesn't really apply on a stompbox forum where mangling the sound beyond all recognition is practically de rigueur!
His stuff is all robust, well-considered, and properly engineered though, and he's very explicit about the assumptions and biases that he makes, so it's a great resource to borrow from, even if you finish up tweaking the odd bit here or there. I'm a big fan. We could use more sites as good as the ESP audio pages.

Ha ha, yeah he's obviously not a guitar player!  :icon_lol:

Kipper4

Ma throats as dry as an overcooked kipper.


Smoke me a Kipper. I'll be back for breakfast.

Grey Paper.
http://www.aronnelson.com/DIYFiles/up/

Rob Strand

#19
QuoteYeah, he's coming from a hi-fi audio angle, where the original signal is sacred and you shouldn't mess with it. All his EQ designs say things like "No-one *ever* needs more than 10dB of tone boost" and stuff as well. That's fine and probably true in the sense in which he means it, but it doesn't really apply on a stompbox forum where mangling the sound beyond all recognition is practically de rigueur!
I've lived in both worlds so I can see both sides.
The best sounding HiFi preamp I ever made was a NE5532 with a volume control.  No EQ at all.


QuoteThere's always this too.

That's an interesting approach.
Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.