Yahoo Groups archive

emulatorII-list

Index last updated: 2026-03-31 23:22 UTC

Message

RE: [emulatorII-list] Re: Do you realize the EII also has a 2 pole filter?

2010-04-03 by Rob Puricelli

Given that Douglas Morton is the co-owner of Q Up Arts
(http://www.quparts.com/cgi-bin/cp-app.cgi) , a company that still supply
samples in Emulator format, I'd wager this is either a wind up or a hacked
email account.

 

I'd be MOST surprised if it was actually him being 100% serious. Then again,
who knows?

 

Rob.

Failed Muso.

 

From: emulatorII-list@yahoogroups.com
[mailto:emulatorII-list@yahoogroups.com] On Behalf Of andrei.kudryavtsev
Sent: 03 April 2010 16:02
To: emulatorII-list@yahoogroups.com
Subject: [emulatorII-list] Re: Do you realize the EII also has a 2 pole
filter?

 

  

Facetious story )))
I think Douglas expected to get an answer to some pimple-faced lad but not
to Jered Flickinger owner of Future Retro.
Douglas, check the link:
http://www.future-retro.com/company.html

Jered, I played a lot with SSM filters, especially with SSM2044 and made
separate stereo unit with midi control. It's true that EMU didn't implement
all possible features of that 2045 but I don't think that tweaking inside is
better than do the same outside with additional SSM filters. Thanks to eBay
that we can still buy it new old stock. I spent few month by servicing my
EII and don't want to open it anymore ))) Meanwhile I'll probably support
you in this idea. 
BTW about 4ms "open filter-delay"..- Have you made this HW fix? I did it,
quite happy, one of "must have".

Andrei Kudryavtsev, Deftaudio Russia. 

--- In emulatorII-list@yahoogroups.com
<mailto:emulatorII-list%40yahoogroups.com> , "futureretro2001" <jered@...>
wrote:
>
> Wow, Mr. Moron, excuse me I mean Morton... I find your response incredibly
ignorant. Perhaps we should all just rely on presampled sounds and be
content with that. 
> 
> FYI, I already have quite an eclectic collection of vintage and modern
instruments (more than 100 throughout my years), and am quite fond of 8 bit
samplers. However, in my opinion it is obvious that the folks at EMU were
more computer engineers than analog circuit designers. Otherwise they would
have taken full advantage of the options found in the SSM2045 filter chip
(such as 2 pole, 4 pole lowpass filtering, as well as high pass filtering,
or using the additional OTA's in that part for panning monophonic sounds)
instead of implementing the most basic circuit layout found in the SSM2045
datasheet. Not to mention digital envelopes with 4ms slew rates.
> Want to create really snappy percussive sounds anyone? Too bad. 
> 
> I always look for ways to expand the capabilities of the machines I use,
or step outside the box and use the machine in ways others have possibly
overlooked. Otherwise how will we ever discover anything new if we only see
things the way someone presents them to us?
> 
> I think the most important word in the owners manual is "experiment".
> 
> I would hope at least some people on the list might find this modification
info useful. And would like to see more people on this list contribute more
creative ideas as such to get the most out their equipment. 
> 
> My only warning to those wanting to do this mod is, if you do not have the
technical and soldering skills, don't attempt to do it. 
> 
> 
> --- In emulatorII-list@yahoogroups.com
<mailto:emulatorII-list%40yahoogroups.com> , Douglas Morton <doug@> wrote:
> >
> > you should get a modern sampler and throw you e2 in the trash
> > On Apr 1, 2010, at 11:18 PM, futureretro2001 wrote:
> > 
> > > So tonight I'm looking at the filter schematics trying to determine
why the resonance on one of my voices has a higher Q than the others... and
noticed that the SSM2045 filter chip has both 2 pole and 4 pole outputs!
> > > Since there is just a single 4.7K resistor connecting the output of
the 4 pole filter to the input of the amplifier, it seems quite simple that
one could remove this 4.7K resistor, run wires from the 2 and 4 pole outputs
each to seperate 4.7K resistors which are then connected to the two
positions of a toggle switch, the switch common connection then routed to
the input of the amplifier. 
> > > Add this stage for each of the eight voices, and then mount the toggle
switches just above each voices output jack. 
> > > 
> > > I think this could create some interesting results. Being able to play
both 12db and 24db filter types at the same time. Or creating rhythmic
filter type changes as individual notes rotate through the voice
assignments. Plus in my opinion with these SSM and CEM chips the resonance
seems to sound better on 2 pole settings. 
> > > 
> > > There is also the ability to use the unused portion of the SSM2045 to
create a high pass filter as well, although adding this mod would most
likely be a bit more complicated. 
> > > 
> > > Well I for one am at least going to try seeing what the 2 pole filters
sound like.
> > > 
> > > By the way, has anyone ever used their EII as a stereo sampler?
> > > Taking individual left/right samples assigning them to the same key
ranges, but sending them to say left/voice 1, and right/voice 2.
> > > 
> > >
> >
>



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.800 / Virus Database: 271.1.1/2787 - Release Date: 04/03/10
07:32:00

Attachments