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## Sunday, November 19, 2023

### NOVA ESSENTIAL Trance soundset vol 2 for NOVATION MININOVA/ULTRANOVA

video upload by RCS

"NOVA ESSENTIAL Trance soundset vol 2 for NOVATION MININOVA/ULTRANOVA is AVAILABLE NOW!

Grab your copy and make some great music!

Contact me: rozgcsa@gmail.com

More info, price, etc: www.rcssound.com

Check my other soundsets for Roland SH-201 & Novation Mininova/Ultranova synthesizers!"

## Saturday, July 09, 2016

### Borderlands

Published on Jul 9, 2016 davidryle

"I recall driving along Highway 9 in south New Mexico from El Paso, Texas to Animas, New Mexico on the way to Tucson, Arizona. The long bouncy road made an unforgettable impression of the remote southern US border region.

I tried to produce the drone impression of the road noise and wide open scenic expanse in this project.

A live studio take of the modular synthesizer recorded in Cubase and captured by the iPhone. Video edited in Final Cut Pro.

Some module patch highlights include the MI Clouds in Parasite Resonator mode dealing with a few voltage controlled radio station audio signals and one of the melodic sequencer lines.

The bass line is a Q960 step sequencer sent to a Q106 vco through a Yusynth Minimoog LPF. It is sent through a Modcan dual delay and Lexicon studio delay. There is a doubling with the MakeNoise Mysteron through a STG Sea Devils filter and the TipTop Z-DSP with Halls of Valhalla.

Other sequencer lines play various slow melodic passages over the top. Some of the vco sources are half dozen Q106's, Mos Lab 901 + 904A suite, Harvestman Piston Honda and Ian Fritz Synthetic Sound Labs DDVCO through Yusynth Arp 4072 LPF. Effects included Strymon Blue Sky reverb, Behringer DD400 delay, SSL 1310 digital delay, Lexicon MX200's and TC Electronics D-Two.

A periodic low frequency drum sound is generated by an envelope to a STG Post Lawsuit LPF and noise from a Sputnik WCRS.

Clock timing handled by Cubase to Future Retro Mobius which drove the STG Soundlabs sequencer suite, 4MS RCS and QCD and Moon Modular dividers, Pressure Points as well as the Q960 and Q119 sequencers"

LABELS/MORE:
4ms,
5U,
eurorack,
harvestman,
Ian Fritz,
Modcan,
MOS-LAB,
Mutable Instruments,
SSL,
STG,
synthesizers.com,
TipTop Audio,
yusynth

## Sunday, August 24, 2014

### FRESH HAT FOOT

Published on Aug 24, 2014 GnTnDn

"MODSYNTHULAR, LOG DATE 2014AUG24 For Sadies' Tides. Testing the system, still have much Werk. COMPONENTS (Partial and Not All In-Use): DOEPFER; A-106-1, A-110 x 5, A-112, A-114, A-116, A-118, A-119, A-120, A-121, A-130, A-131, A-135, A-138, A-138d, A-140, A-141, A-142, A-143, A-145, A-146, A-150, A-151, A-154, A-155, A-156, A-160, A-161, A-162, A-165, A-19, A-190-2 2x ,Synthwerks FR's, 2x Soundmachines LT,. Pamala's Workout, 3x Circuit Abbey INVY, Dave Jones O'Tool, Delptronics LDB w/ exp.. Intellijel; Dual ADSR, LINIX, MUTAMIX, uVCF. Tiptop Z8000 2x, BD808, Hats909, Drum99, Toppobrillo Quantimator, 4ms RCS w/Exp, Mutable Instruments Links,Intellijel Mutamix x2, Linix, uVCO, uVCF, Corgasmatron,, Dual ADSR, PLOG, Mults, OR's, Inverters, Axiom 25, MPC26, Oberkorn, Pittsburgh SEQ8, WMD Inverter, Analogue Solutions Europa, Flame Knob Recorder. Handmade Modules."

## Friday, May 23, 2014

### NOODLIAN LOGIC FOR MODULAR SYNTHESIZER

Published on May 22, 2014 GnTnDn·40 videos

"Partially Live, I pre-recorded some of the sections played on the keyboards and triggers, so that I would not be in the frame. COMPONENTS (Partial and Not All In-Use): DOEPFER; A-106-1, A-110, A-112, A-114, A-116, A-118, A-119, A-120, A-121, A-130, A-131, A-135, A-138, A-138d, A-140, A-141, A-142, A-143, A-145, A-146, A-150, A-151, A-154, A-155, A-156, A-160, A-161, A-162, A-165, A-19, A-190-2 2x ,Synthwerks FR's, 2x Soundmachines LT,. Pamala's Workout, 3x Circuit Abbey INVY, Dave Jones O'Tool, Delptronics LDB w/ exp.. Intellijel; Dual ADSR, LINIX, MUTAMIX, uVCF. Tiptop Z8000, 2x Toppobrillo Quantimator, 4ms RCS, Mutable Instruments Links,Intellijel Mutamix Linix, uVCO, uVCF, Corgasmatron,, Dual ADSR, PLOG, Axiom 25, MPC26, Pittsburgh SEQ8, WMD Inverter, Analogue Solutions Europa, Flame Knob Recorder. Modules that I built."

## Saturday, February 22, 2014

### ARP Axxe Mono Synth with Mods SN 1623

via this auction

"This Axxe has had some very usefule modifications. The print layout of this version of the Axxe caused a fairly large bleed from the noise-source output which has been reduced by adding a wire to rerout the noise-source. This Axxe has the 4075 filter module that ARP used in many different synthesizers. Sometime during the design phase, a resistor value was miscalculated; as a result, the 4075's cutoff frequency will not sweep up as high as ARP really wanted it to. This may be partially responsible for the commonly held view that ARP filters do not sound as "snappy" as Moog filters. Timothy Smith designed a modification which will allow the cutoff frequency to sweep up as high as ARP meant it to. The mod simply involves changing four resistors on the board from 4.7 to 2.2K. This Axxe has the mod and there was a very noticeable improvement in sound. There have also been two switches added. The first switch was added to disable the extremely irretating LFO reset function. When the switch is engaged the the LFO free-runs which is very useful for legato runs. The second switch when engaged disables the ADSR retriggering which is standard on Arp synths. The Moog synths use single triggering of the ADSR which is necessary for playing legato runs. Finally the irritating RCS type jacks have been replaced with switchcraft 1/4' jacks..."

## Wednesday, April 30, 2008

### EML-101 Multimode VCF Schematic

via Aaron on the sdiy list:

"One project idea that I tossed out to my students, which one student is trying to get work, is to use the idea of an NPN differential amp driving a "differential integrator" to build a 1-pole LPF, which you could then do four times to get a usual 4-pole LPF.

I got the idea from the EML-101 filter schematic [mirror], as expertly redrawn by Marjan Urekar:

The EML-101 is a state variable filter, and said diff amp/diff integrator configurations form the variable gain integrators.

My thought was that we could take the output of such an integrator, and feed it into the opposite input terminal of the diff pair, and that feedback should form a 1-pole LPF, as follows:

The NPN pair driving the differential integrator forms a variable gain integrator with transfer function A/RCs, where A is the voltage gain of the diff pair and R and C are the resistor values used in the integrator. Let's denote wo = A/RC. Now imagine we take the output of this integrator and feed it back into the input with a minus sign. You get something like this:

Y(s) = (wo/s) [X(s) - Y(s)]

Y(s)[1 + wo/s] = (wo/s) X(s)

Y(s)/X(s) = (wo/s) / (1+wo/s) = wo/(s+wo)

Which is the transfer function of a single-pole LPF with cutoff wo with unity gain at DC. (This is the same idea as a usual OTA-C filter 1-pole LPF).

Three questions:

1) I sent my student, Justin, this sketch to get him started, where I just blindly ganked the resistor and cap values from the EML circuit.

Anyway, I just realized I drew that wrong - the EML integrating stage is _inverting_, so we should actually either:

A) Swap the inputs on the differential integrator, to make a noninverting stage, or

B) Take the feedback to the left NPN instead of the right NPN

Does (A) or (B) sound like the safer option?

2) Given the way the "differential integrator" is going to load the differential amp, should I even be thinking of this as a differential amp followed by a differential integrator? Or are they interacting so much such thinking breaks down?

3) Does this whole crazy idea of mine sound like a decent idea at all or is it doomed to insanity?

- Aaron

P.S. This got me wondering if there's an "integrating version" of the standard 3-op-amp instrumentation amplifier? A differential integrator with high input impedance, but something more elegant than just slapping noninverting op amp buffers at the inputs to the above differential integrator?

http://en.wikipedia.org/wiki/Image:Opampinstrumentation.svg"

"One project idea that I tossed out to my students, which one student is trying to get work, is to use the idea of an NPN differential amp driving a "differential integrator" to build a 1-pole LPF, which you could then do four times to get a usual 4-pole LPF.

I got the idea from the EML-101 filter schematic [mirror], as expertly redrawn by Marjan Urekar:

The EML-101 is a state variable filter, and said diff amp/diff integrator configurations form the variable gain integrators.

My thought was that we could take the output of such an integrator, and feed it into the opposite input terminal of the diff pair, and that feedback should form a 1-pole LPF, as follows:

The NPN pair driving the differential integrator forms a variable gain integrator with transfer function A/RCs, where A is the voltage gain of the diff pair and R and C are the resistor values used in the integrator. Let's denote wo = A/RC. Now imagine we take the output of this integrator and feed it back into the input with a minus sign. You get something like this:

Y(s) = (wo/s) [X(s) - Y(s)]

Y(s)[1 + wo/s] = (wo/s) X(s)

Y(s)/X(s) = (wo/s) / (1+wo/s) = wo/(s+wo)

Which is the transfer function of a single-pole LPF with cutoff wo with unity gain at DC. (This is the same idea as a usual OTA-C filter 1-pole LPF).

Three questions:

1) I sent my student, Justin, this sketch to get him started, where I just blindly ganked the resistor and cap values from the EML circuit.

Anyway, I just realized I drew that wrong - the EML integrating stage is _inverting_, so we should actually either:

A) Swap the inputs on the differential integrator, to make a noninverting stage, or

B) Take the feedback to the left NPN instead of the right NPN

Does (A) or (B) sound like the safer option?

2) Given the way the "differential integrator" is going to load the differential amp, should I even be thinking of this as a differential amp followed by a differential integrator? Or are they interacting so much such thinking breaks down?

3) Does this whole crazy idea of mine sound like a decent idea at all or is it doomed to insanity?

- Aaron

P.S. This got me wondering if there's an "integrating version" of the standard 3-op-amp instrumentation amplifier? A differential integrator with high input impedance, but something more elegant than just slapping noninverting op amp buffers at the inputs to the above differential integrator?

http://en.wikipedia.org/wiki/Image:Opampinstrumentation.svg"

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