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E440 Discrete OTA VCF : 2 ways to go |
paults mice nuts
Joined: 16 Jan 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 8:23 pm Post subject: E440 Discrete OTA VCF : 2 ways to go |
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The E440 Euro version of the MOTM-440 VCF (all-transistor discrete VCF based on the SSM2040 structure) is in design now.
Due to panel space, there are 2 ways I can configure it:
#1 - 3 audio inputs (each with it's own attenuator) and 1 FM input (reversing attenuator)
#2 - 2 audio ins/attenuators and 2 FM inputs (1 reversing, 1 regular attenuator).
So, which should it be? Both have a dedicated 1V/OCT input (it can track 4 octaves as a sine VCO)
Current schedule is protoypes in late April, shipping in mid-June. No price yet, but cheaper than a MOTM-440 for sure
My personal 3 favorite MOTM-440 demos:
www.synthtech.com/demo/d_reed.mp3 credits music from the "Black Hawk Down" video game (Russell Brower, who is lead audio designer for WoW and StarCraft 2)
www.synthtech.com/demo/motm_recorder.mp3 from the amazing Ken Elhardt
www.synthtech.com/demo/jerusalem.mp3 for the proggers out there (both bass and then the leads at the end, need good speakers!) |
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Jason Brock just visiting
Joined: 27 Feb 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 8:30 pm Post subject: |
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I think I'd vote for #2.
Both have advantages but at least the 2/2 configuration would let you get some complex stuff going on without any external mixer at all.
Are we also going to get to vote on how many blue LEDs it will have?
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Cat-A-Tonic Lobsters love Muff
Joined: 04 Feb 2008 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 8:38 pm Post subject: Re: E440 Discrete OTA VCF : 2 ways to go |
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| paults wrote: | | #2 - 2 audio ins/attenuators and 2 FM inputs (1 reversing, 1 regular attenuator). |
= win _________________ http://soundcloud.com/decay-generator
| stk wrote: |
We "deserve" exactly what we get, if we leave it up to somebody else to determine our destiny.
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REwire Super Deluxe Wiggler
Joined: 04 Apr 2008 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 8:38 pm Post subject: |
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I'd rather have more CV inputs than audio inputs so I'd go with option #2. Or even an option #3 with three CV inputs, two bipolar.
I've always mixed pre-filter anyway and options for mini mixers are becoming more prevalent.
Dan _________________ http://www.REwireMusic.com |
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reignbear Super Deluxe Wiggler
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Posted: Thu Mar 03, 2011 8:49 pm Post subject: |
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#2 please  |
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wintchil Wiggler Invader
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Posted: Thu Mar 03, 2011 8:51 pm Post subject: |
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| Yes 2 please. |
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Mitchk1989 *Probably* not a cyborg.
Joined: 02 Jan 2011 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 8:52 pm Post subject: |
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| my question is this (please don't take this as rude, I have nothing against your company and in fact have two E350s on the way - I'm being serious here, I want you to sell this to me): What are the crucial differences between this and the z2040 (based on the same filter) that would create a niche for this in euro? |
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Jason Brock just visiting
Joined: 27 Feb 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 8:59 pm Post subject: |
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| Mitchk1989 wrote: | | differences between this and the z2040 |
The Tiptop doesn't track 1v/oct. That would be one thing.
I'm also guessing that while they might sound similar, they will sound different enough that some people will prefer one over the other. |
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plord Wacky for Wiard Wiggler
Joined: 30 Jan 2008 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 9:07 pm Post subject: |
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| Option #2 please! |
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negativspace Manhattan Analog
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paults mice nuts
Joined: 16 Jan 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 9:14 pm Post subject: |
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The circuit implementation is quite different, and hence they will sound differently. It's partly due to the caps I use, partly to the circuit design itself. The TipTop uses standard OTA ICs, the E440 uses matched transistor pairs (9 of them).
So, in this case the "proof is in the pudding". Fans of the MOTM-440 will say it has a very "hollow-body, wooden" tone to it (which is why the 3 demos above sound so good). It's not as "electronic-sounding" as say a Moog ladder or MS-20 type, and doesn't suffer from state-variable phase shift issues (I'm not a big fan of the state-variable topology).
It will generate the lowest distortion analog sines out there (like <0.025% THD) but it's not a LFO (the lowest self-resonant frequency is around 32Hz). |
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VanEck Super Deluxe Wiggler
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paults mice nuts
Joined: 16 Jan 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 9:17 pm Post subject: |
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No love for #1, I guess  |
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Mitchk1989 *Probably* not a cyborg.
Joined: 02 Jan 2011 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 9:20 pm Post subject: |
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I think its mostly that whereas 5u has "triple VCO" modules, we tend to have "2 VCO + Ring mod" combo modules, plus there are tons of tiny mixers. Not to mention that 5u is popular with moog fans (for obvious reasons) who are used to the "3 osc voice" while almost every other synth company was doing 2 per voice.
Even the macbeth modules which are basically a "minimoog+" in eurorack format only put 2 oscs in the main sound generation module and sell the third as an extra. |
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paults mice nuts
Joined: 16 Jan 2009 Last Visit: 18 May 2013
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rafe127 classy undercarriage
Joined: 02 Aug 2009 Last Visit: 17 May 2013
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Posted: Thu Mar 03, 2011 9:38 pm Post subject: |
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#2 seems like the option I would use more.
I rarely use multiple audio ins on the same filter.
Soooo......... any chance of the e480 on the horizon? |
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paults mice nuts
Joined: 16 Jan 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 9:40 pm Post subject: |
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| That would be a really difficult one, if it used the same electrical design. I would have to not use CA3280s (unobtanium). If E440 sells well, I will ponder it. |
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decaying.sine Broken <--> Fixed
Joined: 03 Jun 2009 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 9:44 pm Post subject: |
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JFC. I want a 5U version of the 440. What's the hold up on that one? Why the hell are the euro ones being made at the expense of the 5U? Is this like some sort of hobby for you?
go fuck myself
 _________________ Brian
"I must create a system or be enslaved by another mans; I will not reason and compare: my business is to create." William Blake |
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Henfield Better Chemistry through Sound
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Posted: Thu Mar 03, 2011 9:54 pm Post subject: |
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| Paul, any chance of bringing over the 490 filter? Euro needs a good standalone Moog Style filter, and the 490 was the only MOTM module that I kept in my old Dotcom setup, as I loved its sound! (although I heard many good things about the GX-1 filter as well) |
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Mitchk1989 *Probably* not a cyborg.
Joined: 02 Jan 2011 Last Visit: 18 May 2013
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Posted: Thu Mar 03, 2011 10:00 pm Post subject: |
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| I was actually thinking about DIYing a filter that's pretty much the 480 MOTM one... only me being stupid was thinking "an analogue version of the monomachine filter block" because I didn't know what the CS-80 filter was like. |
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