The "Woody" or other acoustic sims?

[jimbob]

I need to build something that gives me that nice warm acoustic sound..Though i have tons of effects--I do not have that one and must build. I canr seem to find the Woody. Last time i did i couldnt dwnld it.
any ideas?

[smoguzbenjamin]

I had the woody on my breadboard for a while when I just started out with pedalbuilding and I never got round to perfing it up and putting it in a box. But it gives a nice warm sparkly sound and I liked it. Of course, (to quote Mark Hammer) simulating an acoustic guitar is a little more complex than a bass boost and a little treble fuzz and a phase shift. But this goes a long way.

[jimbob]

I cant think of anyone/where else that i can find this..I think M Hammer made this but forgot what his website was.

[Alpha579]

yeh, im in intrested in that schematic too, sounds like a cool build...

[aron]

Try the links "link" on the top of the forum.  

http://hammer.ampage.org/

[jimbob]

Yup..that did it..thanks Aron.

[vvvasss]

MAKE BOSS-AC2!!!That is true acousti sound!!!

[David]

MAKE BOSS-AC2!!!That is true acousti sound!!!

Riiiggggghhhhtttt...

Surface-mount components and all.  Yeah, sure!  I can barely do a compressor...

[Zero the hero]

Somebody posted a layout for the AC-2. It was a link to a russian site.
Very difficult, altough: it uses a double side PCB...

[Mark Hammer]

Munky/Marcos has a Woody layout on his site.  I won't make claims to it *nailing* an acoustic sound but for minimal fuss and outlay I think it does a credible job in a group context.  In other words, if there are drums, keyboards, bass and vocals going on at the same time, it will sound "acoustic enough" if you're strumming chords.  On its own, or for discernible finger-picking, you probably want something a little more complex with attention to details, or a real acoustic.

The AC-2 does not NEED to be made with SMT parts, although if you tried to copy the unit on perfboard with DIPs it may have trouble fitting in a box the same size as the original.

[David]

Munky/Marcos has a Woody layout on his site.  I won't make claims to it *nailing* an acoustic sound but for minimal fuss and outlay I think it does a credible job in a group context.  In other words, if there are drums, keyboards, bass and vocals going on at the same time, it will sound "acoustic enough" if you're strumming chords.  On its own, or for discernible finger-picking, you probably want something a little more complex with attention to details, or a real acoustic.

The AC-2 does not NEED to be made with SMT parts, although if you tried to copy the unit on perfboard with DIPs it may have trouble fitting in a box the same size as the original.

Okay, I stand corrected...   :oops:  :oops:  :oops:  :oops:
I THOUGHT it would be surface-mount (seems like everything else is...)

[Gringo]

Hey Mark, i was looking for a datasheet/pinout dor the lm4136 used in the woody, but found nothing.

It doesn't have the same pinout than a standard quad op amp ic, does it?

[Mark Hammer]

No embarrassment required, brother David.  I've never looked inside an AC-2 and wouldn't be at all surprised if there were some use of smaller surface mount components.  Those components are all available, however, in DIP form for us mere mortals to work with.  Of course if it used some sort of LSI chip with no DIP equivalent, that would be another matter.  The current and classic AC-2, though, is a thoroughly analog unit, though, with no digital modelling.

Gringo,

The 4136 was handy, is known to be quiet, and was convenient.  As noted, it does not have the same pinout as a standard quad unit like the LM324, or TL074/084.  You are more than welcome to use any quad or dual chip you want.  I drew up what I did, but if you are attentive to inverting and non-inverting input pins, and power supply pins, you can feel free to use whatever you wish; singles, duals, quads included.  There IS a chip labelled the TL075 which is a BiFet chip with the same pinout as an LM4136/XR4136, but finding them is another matter.

[Marcos - Munky]

Do you want to know where you can get the IC? Here's the answer:
http://focus.ti.com/docs/prod/folders/print/rc4136.html

[Gringo]

Thanks Mark and Marcos!

I was going to draw another pcb layout for the woody, but i think it'll be better if i do so using a standard quad (i'm not a big "re-invent the wheel" fan).

[studiostud]

I had the woody on my breadboard for a while when I just started out with pedalbuilding

I think every guy gets a woody for a while when they start out with pedalbuilding...

[Mark Hammer]

And if it lasts more than 4 hours, call your doctor.

[Ben N]

MAKE BOSS-AC2!!!That is true acousti sound!!!

Ummm, no offense, but have you played an actual acoustic lately?

[Mark Hammer]

I think the goal of acoustic simulators is not somuch to make a solo electric guitar sound like a solo acoustic guitar.  That just seems unreasonable to me.  Rather, the goal is that an electric guitar can be coaxed into providing a sort of acoustic-ey texture in the background of an entire mix.  A little bit like the way all those fake plastic plants in a restaurant or hotel lobby can sort of look real-ish when in the midst of some actual plants....if you don't look too closely.

[DougH]

I've tried the AC-2's in the store and IMO they can do a decent job for strumming chords and so forth. Seems like a good tool for doing "acoustic" rhythm guitar in a band mix- or handy if you have to quickly switch to that sort of a sound from an electric sound. It's not something I would base my whole sound around if I had the acoustic slot in a gig or needed to fingerpick, play leads and etc. YMMV of course.