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Mutant timbre/mod index section PCB
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Author Mutant timbre/mod index section PCB
ultrashock
Veteran Wiggler


Joined: 24 Jun 2010
Last Visit: 26 Jan 2015

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PostPosted: Fri Dec 23, 2011 11:01 am    Post subject: Reply with quote Add User to Ignore List

beautyofdecay_
are you actually scale voltages at the mod. index vca of cv out?
timbre circuit uses only positive voltage for regulation (fet based vca inside in the original scheme).
probably, your mod. index vca also controlled by positive voltages?
in that case you will have a 'hole' in control in half-period when the mod. osc. will go below zero
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clarke68
Making DIY modulars look cool since 2011


Joined: 11 Nov 2009
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PostPosted: Wed Dec 28, 2011 5:13 am    Post subject: Reply with quote Add User to Ignore List

Okay, here's the latest version of the panel:



Changes:

- Name Change (longer name required a redesign of the masthead/attribution)
- Moved input jacks farther from the edges in order to (hopefully) allow for conversion to bananas
- Eliminated separate LIN & EXP FM inputs, in favor of a single switched input
- Distinguished output jacks with black, reverse type


I didn't check the PCB, but I want to make sure that the new FM input scheme is possible/useful. I love the additional clear space on the panel, but is there ever a case where you would want both EXP and LIN FM running at the same time? Would this require an impractical switch (like a 16PDT or something)?

I was really close to changing the word "modulation" to "mutation" everywhere on the panel...so we'd have a Primary Oscillator, a Mutation Oscillator, joined together by the Mutation Index in the center. I shied away because "mutation" isn't a standard synth term, but it sure is cool. Let me know what you think.
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Cat-A-Tonic
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PostPosted: Wed Dec 28, 2011 5:24 am    Post subject: Reply with quote Add User to Ignore List

The panel looks great.

I think the lin/expo switch is ok
because you can still use an external attenuator for the 1v/Oct
if you really need simultaneous lin + expo FM.

The one thing that I can think of that it could possibly be benefit from is an external input for the Timbre section.
It could be normalized with a switching jack,
but it might be fun to try different waveforms as inputs,
or even different sound sources all together.
Then again, I am ignorant of this timbre circuit,
so I might be barking up the wrong tree.

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astroschnautzer
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PostPosted: Wed Dec 28, 2011 6:41 am    Post subject: Reply with quote Add User to Ignore List

Looking nice, I'm though a fan of dedicated lin and expo inputs with attenuators.
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asterisk
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PostPosted: Wed Dec 28, 2011 10:22 am    Post subject: Reply with quote Add User to Ignore List

I'm with astro here too, I like having as many FM inputs with attenuators as possible. I prefer the separate Lin / exp inputs with dedicated attenuators.

I also agree that tapping an input for the timbre section would be cool.

panel is looking great!
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clarke68
Making DIY modulars look cool since 2011


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PostPosted: Wed Dec 28, 2011 11:53 am    Post subject: Reply with quote Add User to Ignore List

"The customer is always right..."

Here it is with two FM inputs:

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asterisk
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PostPosted: Wed Dec 28, 2011 12:02 pm    Post subject: Reply with quote Add User to Ignore List

that's very beautiful!
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Monobass
thonk.co.uk


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PostPosted: Wed Dec 28, 2011 12:50 pm    Post subject: Reply with quote Add User to Ignore List

two FM inputs is a good idea thumbs up
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J3RK
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PostPosted: Wed Dec 28, 2011 12:54 pm    Post subject: Reply with quote Add User to Ignore List

Beautiful Clarke!
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astroschnautzer
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PostPosted: Wed Dec 28, 2011 1:09 pm    Post subject: Reply with quote Add User to Ignore List

clarke68 wrote:
"The customer is always right..."

Here it is with two FM inputs:

we're not worthy
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Monobass
thonk.co.uk


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PostPosted: Wed Dec 28, 2011 2:00 pm    Post subject: Reply with quote Add User to Ignore List

IMO those large black panels kinda make it look a little less refined than the CGS and CLee panels, but no biggie.
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clarke68
Making DIY modulars look cool since 2011


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PostPosted: Wed Dec 28, 2011 2:25 pm    Post subject: Reply with quote Add User to Ignore List

Monobass wrote:
IMO those large black panels kinda make it look a little less refined than the CGS and CLee panels, but no biggie.

Thanks for the feedback. I did that because, now that I have a whole bunch of my panels together in a rack, I find they look a little "clinical" together. It seemed like the thing they were missing was some contrast. Not sure if this is the best way to add it, but I do like how it clearly delineates the outs, especially on the latest version with the two FM inputs.

Definitely interested in what anyone else thinks...ctrl-z is always an option until the order is placed!
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lazerkind
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PostPosted: Wed Dec 28, 2011 2:44 pm    Post subject: Reply with quote Add User to Ignore List

I like the new blacker version. Very easy to find the ins and outs.

How would one wire the pitch-> Fm mod?
My thought about the mutant index was to add one more switch to add FM to the lin FM input and/or the exp FM. Not sure how useful that would be but better to speak now than after the panels are done right wink

Also, I wonder if there sould be useful to have a external input to the timbre?
(I do have some wavefolders already and the MSU is even more, but it is probably a different character in the mutant timre version?)
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keninverse
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PostPosted: Wed Dec 28, 2011 3:09 pm    Post subject: Reply with quote Add User to Ignore List

lazerkind wrote:
I like the new blacker version. Very easy to find the ins and outs.


I second this. It definitely breaks up the panel real estate and easy to visually locate jacks.
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Monobass
thonk.co.uk


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PostPosted: Wed Dec 28, 2011 3:17 pm    Post subject: Reply with quote Add User to Ignore List

It's not that I don't like the usability that the big black areas add, it's more that I think the way the section titles are done look really sharp and stylish in contrast. I'll be buying two regardless thumbs up
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clarke68
Making DIY modulars look cool since 2011


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PostPosted: Wed Dec 28, 2011 3:21 pm    Post subject: Reply with quote Add User to Ignore List

lazerkind wrote:
How would one wire the pitch-> Fm mod?

I don't remember off the top of my head, but I'm sure I got the idea from somewhere in this thread [edit: I mean the Build/Mod thread]. Great if someone can dig it up, otherwise I'll be sure to verify it before I drop the order.


lazerkind wrote:
My thought about the mutant index was to add one more switch to add FM to the lin FM input and/or the exp FM. Not sure how useful that would be but better to speak now than after the panels are done right wink

Not sure I'm following you here. An FM input on an FM input?


lazerkind wrote:
Also, I wonder if there sould be useful to have a external input to the timbre?

I think it's a great idea. I'm curious what beautyofdecay thinks, how well it would work with other modular signals, but I'll start looking for a spot to put a normalized input jack, as Cat-A-Tonic suggested.


Last edited by clarke68 on Thu Dec 29, 2011 1:39 pm; edited 1 time in total
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negativspace
Manhattan Analog


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PostPosted: Wed Dec 28, 2011 6:14 pm    Post subject: Reply with quote Add User to Ignore List

Monobass wrote:
two FM inputs is a good idea thumbs up

J3RK wrote:
Beautiful Clarke!


+2


Clarke68 wrote:
lazerkind wrote:
My thought about the mutant index was to add one more switch to add FM to the lin FM input and/or the exp FM. Not sure how useful that would be but better to speak now than after the panels are done right wink

Not sure I'm following you here. An FM input on an FM input?


I think he may mean that he'd like the switch to route the timbre section's output between the Lin and Exp taps on the primary oscillator.

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rico loverde
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PostPosted: Wed Dec 28, 2011 6:27 pm    Post subject: Reply with quote Add User to Ignore List

i like the black areas, although my ocd wants the Timbre box to be centered.

can't wait for this one!!!!

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mikecameron
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PostPosted: Wed Dec 28, 2011 6:28 pm    Post subject: Reply with quote Add User to Ignore List

here's my input: I love the way it looks currently. Is PCB size dictating the HP of the panel? That center section could easily be condensed to have roughly the same density as the 2 oscs and possibly shave 4hp off the width. (addition of timber input could have an effect here too)

I think the pots should line up as much as possible. Not between the sections necessarily, but the small knobs in the OSC sections (aside from EXP FM att) should line up. I love the combinations of knob sizes and dont want it to be set up on a grid. This panel has personlity!

Black areas remind me a little of the TTA scheme (and thats not a bad thing, those modules look great).
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clarke68
Making DIY modulars look cool since 2011


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PostPosted: Wed Dec 28, 2011 7:16 pm    Post subject: Reply with quote Add User to Ignore List

rico loverde wrote:
my ocd wants the Timbre box to be centered.

It is centered! Within the timbre section, anyway... cool I have an idea that I'll try tonight.


mikecameron wrote:
Is PCB size dictating the HP of the panel?

Partially, but not entirely...you can see the PCB mounting holes on there.


mikecameron wrote:
That center section could easily be condensed to have roughly the same density as the 2 oscs and possibly shave 4hp off the width. (addition of timber input could have an effect here too)

I don't know...with the two CV attenuators and the sensitivity pot, the whole Mod. Index section is three pots wide with very little room to spare. In fact I think I lowered the sensitivity pot so it could "nest" with the pot next to it behind the panel.

That said, I did design this panel to work with 16mm Alpha pots. It will save you some panel tetris to use 9mm, but it doesn't require them. Even so, if I did really pack 'em in with the tiny pots I still don't think I could lose 4HP (that's almost a full inch) and still keep decent twiddling room around the knobs.


mikecameron wrote:
I think the pots should line up as much as possible. Not between the sections necessarily, but the small knobs in the OSC sections (aside from EXP FM att) should line up.

I'm pretty sure I understand what you mean, and I'm pretty sure I can do it. Stay tuned.


@ everybody:
I really appreciate all of your kind comments and enthusiasm! I'm having a total blast working on this...I can't wait to see it live myself!
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