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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: 17 Sep 2014

Posts: 559
Location: Underhaven

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
Last Visit: 18 Sep 2014

Posts: 1317
Location: Bay Area, CA

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
Lobsters love Muff


Joined: 04 Feb 2008
Last Visit: 19 Sep 2014

Posts: 3012
Location: Yokohama, Japan

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
Super Deluxe Wiggler


Joined: 19 Nov 2008
Last Visit: 18 Sep 2014

Posts: 1680
Location: Finland

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
Super Deluxe Wiggler


Joined: 19 Jun 2010
Last Visit: 18 Sep 2014

Posts: 1467
Location: Burlington VT

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


Joined: 11 Nov 2009
Last Visit: 18 Sep 2014

Posts: 1317
Location: Bay Area, CA

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
Super Deluxe Wiggler


Joined: 19 Jun 2010
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Location: Burlington VT

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


Joined: 29 May 2009
Last Visit: 19 Sep 2014

Posts: 8119
Location: Brighton, UK

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
Super Deluxe Wiggler


Joined: 22 Dec 2009
Last Visit: 19 Sep 2014

Posts: 3625
Location: Seattle

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
Super Deluxe Wiggler


Joined: 19 Nov 2008
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Location: Finland

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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