Dotcomformat

Could someone talk a little bit about the Post-Lawsuit filter (PLF)?
The description on the website is a bit lacking. For example:

1) How steep is the rolloff? I'm guessing it's 24db/octave.
2) What's the difference between the control inputs and the FM input?
3) Does the FM Amount knob only affects the FM input? If so, are the
control inputs fixed to 1V/Octave?
4) I've read that the ARP 4072 filter (which the STG filter is NOT
based on) only reaches 12 kHz. Does the PLF also has this limitation?

Finally, would it be possible for someone to upload some mp3, for
example, by running a sawtooth or square through the filter and
sweeping the cutoff at low, mid, and high resonance settings? I know
this is asking too much, but I'm really interested.

Thanks!

On Apr 16, 2008, at 7:02 PM, Alfonso Alba Cadena wrote:
> 1) How steep is the rolloff? I'm guessing it's 24db/octave.

yes. this is a 4-pole filter. 4-pole filters are normally associated  
with Moog, Sequential Circuits, and Roland keyboards.

it sounds more "moogey" than "prophetey" in the sense that it bears  
some resemblance to a Multimoog wearing a leather corset with robust  
boning. it's not quite as clinical as a Prophet filter but definitely  
a bit more risqué and aggro than a Norlin era Moog synthesizer, if  
you're asking for colourful observations about its tone.

> 2) What's the difference between the control inputs and the FM input?
> 3) Does the FM Amount knob only affects the FM input? If so, are the
> control inputs fixed to 1V/Octave?

the "FM Amount" knob is simply a control attenuator for the "FM  
Input." all inputs have one volt per octave response, including the  
additional 4 inputs on the as-yet-to-be-utilised "STG Bus" connector.

i really don't know why i named this control and input in this  
fashion, other than Paul Schreiber has a similar arrangement on his  
MOTM-490. all further filter modules will label the knob "Control  
Attenuator" as that is really more accurate.

> 4) I've read that the ARP 4072 filter (which the STG filter is NOT
> based on) only reaches 12 kHz. Does the PLF also has this limitation?

well it's definitely not a clone, but does happen to have like the  
same topology with the same transistors etc. i just don't like the  
"C" word: it's over-used.

one aspect of its uncloneliness is the fact that this factory defect  
of the 4072/4075 has been taken care of in this design. i can assure  
you that if i shipped this filter without calibrating it, you would  
find it only worked in the superaudio domain.

> Finally, would it be possible for someone to upload some mp3

a video-editor friend of mine will be in town for a month starting in  
early May, and we'll be working on video demos during that period. i  
probably should have some mp3 clips up too, but apparently i've been  
careless about this. my apologies.
---
Suit & Tie Guy
suitandtieguy.com
stgsoundlabs.com

Thanks for the prompt response, STG. I would love to
see some videos, specially if the audio quality is
reasonably maintained.

Another question: you said the filter was a bit
moog-ish. Does it sound too similar to the dotcom
Q150?

Thanks!


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On Apr 17, 2008, at 8:05 AM, Alfonso Alba wrote:
> Another question: you said the filter was a bit
> moog-ish. Does it sound too similar to the dotcom
> Q150?

i'm afraid only someone with both could make a comparison.

one customer remarked to me a couple nights ago that it was in  
ballpark to a Moog character, but more "acidey".

it doesn't sound like my Minimoog, if that's what you're asking.
---
Suit & Tie Guy
suitandtieguy.com
stgsoundlabs.com

On Apr 17, 2008, at 1:03 PM, Suit & Tie Guy wrote:
> On Apr 17, 2008, at 8:05 AM, Alfonso Alba wrote:
>> Another question: you said the filter was a bit
>> moog-ish. Does it sound too similar to the dotcom
>> Q150?
>
> i'm afraid only someone with both could make a comparison.
>
> one customer remarked to me a couple nights ago that it was in
> ballpark to a Moog character, but more "acidey".


i'll make recordings of both in the next couple of days. to me it  
doesn't sound like the q150 imho, more like the q107.

thanks,

-jon
"There are no differences but differences of degree between different  
degrees
of difference and no difference."
- James, William. "Subjective Effects of Nitrous Oxide." Mind. 1882;  
Vol 7.