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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Wah/Anti Wah works well in shaping our square waves
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Draal



Joined: May 18, 2010
Posts: 304
Location: Oak Park, IL
Audio files: 5

PostPosted: Wed Apr 02, 2014 4:47 am    Post subject: Wah/Anti Wah works well in shaping our square waves Reply with quote  Mark this post and the followings unread

Been ages since I've posted but I have been slowly tweaking my modules in my lunetta as time permits. I had a couple of simple vcf's in my machine that I built back in the early days of discovering lunetta. I wasn't thrilled with the range so I cut out that module and built Craig Anderton's Wah/Anti Wah circuit.

While built originally for guitar, it works well for lunettas too. This isn't an auto wah; more of a fixed wah. Actually two wah circuits that are a little different in the filtering that are controlled by a pot wired up to sweep between the two.
(It's morning here so pardon if I just made no sense Rolling Eyes ).



Nothing high tech or fancy here. I'm sure there are more versatile modules to build but I like to keep the soldering reasonable so I can spend more time playing Wink . I like building things with stuff found in my parts bin; nothing hard to find or order.

I added cv input at one of the lugs on the pot. Works great in modulating the effect with an LFO.


cv.png
 Description:
I added this transistor/resistor setup at the top lug of the wah/anti wah's pot. Easy way to modulate/add tonal complexity.
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cv.png



wah.png
 Description:
I usesd 2 lm741's I had in the parts bin. Choose a dual op amp that you have on hand.
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wah.png



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DUBmatze



Joined: Feb 18, 2013
Posts: 90
Location: south Germaica (schwabilon)

PostPosted: Fri Apr 04, 2014 12:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

very cool Sound!
so you just connnect the CV ciruit to one side of the (crossfading) 50k Log pot or to the Ground connection?

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Draal



Joined: May 18, 2010
Posts: 304
Location: Oak Park, IL
Audio files: 5

PostPosted: Fri Apr 04, 2014 12:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

I wired the collector of the transistor to one of the outer lugs of the 50k pot. I chose lug 3 but lug one could also be used sinced it connects to the other "wah". It sounds different on each lug because the filter caps are different.

Might be a nice switch option or a second cv input point. Must experiment next time in my mancave!

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