AMZ FX ANALOG ALCHEMY GEOFX MEF ROG MEF DIY WIKI

BACK OFF...passive control.

Started by deadastronaut, May 25, 2016, 08:10:51 AM

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deadastronaut

May 25, 2016, 08:10:51 AM
ok this seems an obvious little tool...but essential in my opinion...

i was jamming at the weekend, and that old bug bear of mine
going from hi gain/vol to 'backed off''  e.g. cleaned up for quieter parts hit me yet again.... :icon_rolleyes:

here it is... uber simple...

its always pissed me off rolling back the guitars vol in a live situation as it :

A: takes your hand off playing to adjust your guitar vol,

B: guitar vol never ends up in the sweet spot perfectly...each time.

C: is a pain in the ass when going back to high gain again as you have to turn vol up coming back to hi gain again..

(of course this can be done with a vol pedal, but only if it has a a min/max control...)





LED VERSION:




put it in front of your dirt...sorted.  8)
might be my first ever 1590a.. ;)
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//

suncrush

#1
May 25, 2016, 08:22:52 AM
Looks interesting.  Let us know how it works out.

samhay

#2
May 25, 2016, 08:46:31 AM
Rob - it's not true bypass, which may cause problems when you are stumbling about in your spacesuit and managed to kick the  volume all the way down - it will mute you signal regardless of switch state.
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

deadastronaut

#3
May 25, 2016, 08:54:06 AM Last Edit: May 25, 2016, 09:45:47 AM by deadastronaut
IMAGES UPDATED...

look ok?.... i need more coffee... ;D

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//

Kipper4

#4
May 25, 2016, 09:47:08 AM
I like it :)
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/

induction

#5
May 25, 2016, 09:54:26 AM
Can't see the images but the description sounds like the EH signal pad.

Sells for $45 if you can believe that.

deadastronaut

#6
May 25, 2016, 10:07:41 AM
ok..heres a clip...

try doing this with a pot... :icon_rolleyes:

https://dl.dropboxusercontent.com/u/7464107/BACKOFF.wav


guitar up full...on both.. 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//

Ben Lyman

#7
May 25, 2016, 10:12:19 AM
cool. how about just building it right into your favorite dirt box with two footswitches... and a 3rd footswitch for a compressor after to even out the sounds, you know boost the cleans and level the dirties
"I like distortion and I like delay. There... I said it!"
                                                                          -S. Vai

deadastronaut

#8
May 25, 2016, 10:19:46 AM
yep, good idea... 8)

i just fancied a standalone quickie..for any dirt.

makes for a nice passive clean boost/cut too... 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//

deadastronaut

#9
May 25, 2016, 10:22:42 AM
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//

stringsthings

#10
May 25, 2016, 11:53:37 AM
Very good idea.  Not fancy, but useful.

Groovenut

#11
May 25, 2016, 12:25:39 PM
Kind of the same idea behind the Paul Gilbert Detox EQ. Main dif I believe is they use a buffer and feed the signal through an EQ so the reduced volume signal can be EQed differently.

Nice work Rob!

If you were fancy you could put 2 or more in the box and have presets  :icon_mrgreen:

(with additional switches obviously)
You've got to love obsolete technology.....

suncrush

#12
May 25, 2016, 01:18:09 PM
Quote from: Groovenut on May 25, 2016, 12:25:39 PM
Kind of the same idea behind the Paul Gilbert Detox EQ. Main dif I believe is they use a buffer and feed the signal through an EQ so the reduced volume signal can be EQed differently.

Nice work Rob!

If you were fancy you could put 2 or more in the box and have presets  :icon_mrgreen:

(with additional switches obviously)

I wonder if you could use an vactrol and PIC to save presets and keep the circuit tiny.

Groovenut

#13
May 25, 2016, 01:20:51 PM
Quote from: suncrush on May 25, 2016, 01:18:09 PM
Quote from: Groovenut on May 25, 2016, 12:25:39 PM
Kind of the same idea behind the Paul Gilbert Detox EQ. Main dif I believe is they use a buffer and feed the signal through an EQ so the reduced volume signal can be EQed differently.

Nice work Rob!

If you were fancy you could put 2 or more in the box and have presets  :icon_mrgreen:

(with additional switches obviously)

I wonder if you could use an vactrol and PIC to save presets and keep the circuit tiny.
Maybe, but now it's no longer passive and you've opened a whole new can of worms....
You've got to love obsolete technology.....

R.G.

#14
May 25, 2016, 01:47:00 PM
Quote from: deadastronaut on May 25, 2016, 08:10:51 AM
(of course this can be done with a vol pedal, but only if it has a a min/max control...)

Or some kind of reliable indicator. Maybe something like a string of LEDs that light up as the pedal rocks from full off to full on.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

deadastronaut

#15
May 25, 2016, 02:16:03 PM
@rg...

oi!....none of that powered stuff... ;D
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//

Asymmetric

#16
May 25, 2016, 03:13:10 PM
Good idea, but wouldn't it kill some highs? What about adding a treble bleed? And why 100K? Wouldn't 1Meg be better?

samhay

#17
May 25, 2016, 03:14:58 PM
>Maybe something like a string of LEDs that light up as the pedal rocks from full off to full on.

That'll never catch on, but it would look at home in Rob's space shuttle cockpit.

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

ashcat_lt

#18
May 25, 2016, 04:13:19 PM
Quote from: Asymmetric on May 25, 2016, 03:13:10 PM
Good idea, but wouldn't it kill some highs? What about adding a treble bleed? And why 100K? Wouldn't 1Meg be better?
Agreed.  If there was no V pot in the guitar itself, this 100K would still be a bit low for most guitars.  Since this will be in parallel with existing pots in most guitars, I'd want it to be bigger - preferably bigger than whatever is in the guitar...

...except then the series resistance is greater when turned down, which causes its own issues...

robthequiet

#19
May 25, 2016, 10:06:59 PM
Well, if you don't mind adding some pots I wonder if Leo Fender's PTB control might achieve the effect, not only by attenuating level but also lifting some lows out. Schematic attrib. to Leo Fender from tonefiend and premie guitar,



Built into a box, of course...
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