GODSPEar OSCar Filter Translation | British Tribute Riffs [Demo #3]

GODSPEar is my homage to the Oxford OSCar filter in Eurorack format. Time to enjoy a dual voice setup w/ musical contexts featuring a few riffs inspired by British synth royalty.

GODSPEar Full Specs on Modular Grid
Check my Reverb store for GODSPEar and other module availability

G-Storm Electro | Modules With Mojo

GODSPEar | Detailed Overview | Oxford OSCar Eurorack Filter Translation ...

GODSPEar is my homage to the Oxford OSCar filter in Eurorack format. In this video I present a walkthrough detailed explanation what all the features do while auditioning the audio. And make a few weird sound patches along the way. Recorded direct to Pittsburgh Modular Outs to iPhone via Roland Go Mixer Pro-X. Some gain normalization used. While this demo isn't very musical, let me know in the comments if you would be interested in something more of musical exemplar.

0:00 Intro - Inputs and Output
0:47 Two Filters, One Frequency
1:41 Filter CV
2:37 Q (Res) and Filter Tracking
4:19 Q (Res) CV
5:01 Filter Modes
6:38 Separation
9:04 Separation CV and the Full-Wave Rectifier
11:04 Audio Rate Modulation

Full Specs on Modular Grid
Check my Reverb store for GODSPEar and other module availability

G-Storm Electro | Modules With Mojo

GODSPEar | Oxford OSCar Eurorack Filter Translation [Demo #1]

Today I am introducing GODSPEar, my homage to the Oxford OSCar filter in Eurorack format. GODSPEar is the only filter used in these audio recordings. Detailed explanation of the module and patch examples will be in a forthcoming Demo #2. Audio recorded direct to Tascam DR-05, some additional compression and normalization used in the making of this audio.

Full Specs on Modular Grid
Check my Reverb store for GODSPEar and other module availability
The audio demos can be heard on their entirety on my Soundcloud page.

G-Storm Electro | Modules With Mojo

T2K-VCF Eurorack Filter Adaptation Now Available [Powertran Transcendent 2000]

Introducing the T2K-VCF: an 8HP analog circuit adaptation of the lowpass/bandpass filter from an obscure 70s monosynth – Powertran Transcendent 2000. T2K-VCF is a 2-pole CA3080 OTA design w/ CA3140 op amp compensation at each stage. Translation = no loss of bass frequencies even at extreme resonance settings. Resonance will self-oscillate and produces a nice sinewave alone. T2K-VCF will fatten up routine oscillators - transform boring square/pulse and straight ramps into curvy vixens dressed to kill. Wavefolded material sounds phenomenal on this.

FREQUENCY | the initial Cutoff Frequency of the filter
RESONANCE | the depth of the peak frequency resonant feedback
IN1 & IN2 | Mix together 2 different audio signals, each w/ their own mix pot.
KB | Modulate the Cutoff Frequency w/ a V/oct signal or any other polar/bi-polar mod. Self-oscillation resonance will track v/oct loosely, but you will need to tweak the Initial Cutoff Frequency (Tune) and the KB amount knob (width tracking) to get there.
CV | Another Frequency mod can go here, range is greater than the KB input.
SHAPE | Select between LP lowpass or BP bandpass filter output w/ this mode switch.
OUT | the audio output jack of the filter

Specs 8HP Module width
24 mm Module depth
14 mA on +12V
25 mA on -12V
0ma on 5V (not used)

Check my Reverb Store for availability and pricing.

SH5-VCF Dual Filter Patches + Sounds [Demo #2]

In this video I will show some cool patches with SH5-VCF Dual Filter.
As per usual, listening w/ headphones or quality monitors is the best audio experience.
Watch your levels, this is a filter demo w/ some resonance ahead.

Check my Reverb store for SH5-VCF, 101-VCO, 2xVCA, 2xADSR availability

Timestamps
0:00 Sounds and Intro
0:16 Patch 1 | Fat Liquid Bass
2:44 Patch 2 | Series Cascading the Dual Filters
3:01 Patch 3 | Evolving Sequence
3:47 Patch 4 | Analog Percussion
5:20 Patch 5 | Supersaw! Unison Stack
6:33 Patch 6 | Complex Analog Thing

Oscillator | 101-VCO
Modulations | Batumi, 2xADSR
Control + Sequencing | Keystep Pro
No added effects, EQ, Compression, nor other post-processing.

Introducing SH5-VCF Dual Filter Eurorack Adaption (Roland SH-5) [Demo #1]

Introducing the SH5-VCF.
An all-analog eurorack adaptation of the Roland SH-5 Synthesizer Filter and Mixer.
The Lowpass filter is a diode ladder configuration using open-collector matched transistor pairs.
No filter-on-a-chip here :D
Similar Lowpass configuration was used in the Roland SH-1000 and the earlier System 100 (not 100m).
The dedicated Bandpass section introduces voltage control modulation not found on the original.
While the two filter sections are routed in parallel, that doesn't stop you from being able to re-route them in series configuration.
What you can expect from the SH5-VCF is the quintessential Roland modular filter experience.
These are all reasons I say it is time to get a little more serious.

Check my Reverb store for SH5-VCF, 101-VCO, 2xVCA, 2xADSR availability
As per usual, listening w/ headphones or quality monitors is the best audio experience.
Watch your levels, this is a filter demo w/ some resonance ahead.
Be sure to check out SH5-VCF Demo 02 to see how I made the patches in this video!

Oscillator | 101-VCO
Modulations | Batumi, 2xADSR
Control + Sequencing | Keystep Pro
No added effects, EQ, Compression, nor other post-processing.

G-Storm Electro 3x Delta VCF Eurorack Filter [Demo #4]

My Delta VCF is now available in black panel.
To commemorate the occasion I made a little demo using three of them.
Delta VCF is a eurorack adaptation of the Korg Poly-61 + Delta synthesizer filter.
Check my Reverb store for module availability

Bass
Pittsburgh Primary Osc | Delta VCF #1 | Timefactor
Arpeggio
GSE 101-VCO | Delta VCF #2| FX Aid Delay
Lead
2x 4027 VCO | Delta VCF #3 | FX Aid Reverb
LFOs | Batumi
Percussion | Digitakt

Mixed on Mackie 802VLZ, recorded straight to Tascam DR-05.
No additional mastering fx or eq.

JP6-VCF Version 3! [SNEAK PEEK]

Coming very soon.
Black panel, white lettering.
8HP.
Skiff-friendly.
More information HERE

G-Storm Jupiter-6 VCF vs. Jove vs. SE 8106 modules

I get asked quite a bit what makes the Jupiter-6 VCF different from modules like the Jove by System-80, and the the Studio Electronics 8106. The Jove and 8106 circuits are a similar topology using readily available OTA chips, their PCBs are mass-produced, their boards are probably automated assembly for SMT parts. Mine uses the expensive/rare/original Roland OTAs, my PCBs are currently copper etched and tinned by hand, and fully assembled by hand as well. I'd love to build a Jove for myself, alas - no time (and PCBs are currently sold out). The demos of the Jove sound nice. I haven't checked out any demos of the 8106 yet, but everything SE makes is fantastic. I also suppose this is as good a time to announce my Jupiter-6 VCF is also undergoing a front panel re-design and will be very similar to my Delta VCF version 2.

My Delta VCF Version 2 is Here!

My first video of 2018, I know it's been a while. I have been busy working on this little beauty! Today I introduce my Delta VCF version #2. You will remember the Delta VCF is my fully analog filter adaptation of the Korg Delta/Poly-61 synthesizers with the addition of a 2-Pole mode. My version #2 is exactly the same sound, functionality, and circuit as the version #1. It has a revised panel layout that makes the trimmers available from the front, is 12HP, and is now skiff-friendly. While we're at it, I audition some sound examples - starting with some PWM bass sweeps. I have trimmed the resonance for the module I am showing today so that it could self-resonate, I modulate that with an LFO. Audio recorded direct to Tascam DR-05, no effects or EQ added.

Check out Modular Grid for full details
Modules are offered exclusively on Reverb.com

Tonus VCF (X3) Filter Gets An Onslaught of CVs Eurorack Synthesizer

This being my THIRD video of my new Tonus VCF module, and therefore I must punish THREE of them, in a line up, with an onslaught of control voltages. For those living under a rock, Tonus VCF is my all-analog Eurorack adaptation of the righteous ARP 2600 filter - the early version 4012. Module #1 (left) is belting out a big ol' kick drum using self-resonance only. Module #2 (middle) is being grass fed whole grain digital bliss from the DNA Symbiotic Waves. Module #3 (right) is squeaking out stupid little astrodroid noises using only self-resonance. Varigate 4 and Beatstep Pro are micro-managing other things: Bastl Skis dual VCA, Pittsburgh Synthesizer Box, Toolbox Sample/Hold, 4MS RCD, sequential switch. All 3 filters mixed using my Infusor module. No filters were harmed in making this demo.

ARP 2600 Filter Adaptation - Tonus VCF Eurorack 4012 Module

G-Storm Electro is now on Facebook http://www.facebook.com/gstormelectro

G-Storm announces a new all-analog eurorack module, the Tonus VCF. For a long time I wanted a vintage ARP 2600 synthesizer. Then it dawned on me, all I really wanted was a faithful adaptation of the filter in my eurorack. I'm calling it the Tonus VCF on account that the Tonus ARP logo design was used on the earliest 2600s. Without any further adieu, let’s listen to the Tonus VCF in action!

Great care was taken to keep the Tonus VCF design as close to the original as possible including component selection and transistor pair matching. My modules are painstakingly hand-crafted in the USA in limited quantities. The first units are planned to be available on Reverb.com next week, but my parts suppliers are dealing w/ holiday shipping volumes this time of year. Asking price $200 USD, international shipment available. Full details and specs at Modular Grid.

Tonus VCF Module First Look [ARP 2600 4012 Filter Eurorack Adaptation]

Details are now available at Modular Grid. Yes it's real, and it's spectacular. Should be available for $200 usd in the next week or two on Reverb.com.
In my previous video I showed a breadboard circuit of a classic analog synthesizer filter. The identity of the filter was left a mystery. Today in this video I not only reveal that it is a faithful Eurorack adaptation of the 4012 module from the early ARP 2600 synthesizers, you will get a sneak peek at my hand-crafted prototype design - the Tonus VCF - and hear it in action!

I jump right in and see how the Tonus VCF sounds by sending the resonance into self-oscillation. Be warned, demonstration of resonance self-oscillation can be shrill. Then I cut the resonance and send a sawtooth to the audio input, then a square wave, then a complex digital waveform from the Pittsburgh DNA Symbiotic Waves. After that I remove the audio inputs, return to pure resonance self-oscillation, and this time send the Sawtooth into the CV input to make the filter go berserk with some Filter FM. These are the kinds of sounds the ARP 2600 was known. Last I use an LFO and Sample-Hold as CV inputs. Audio recorded direct to Tascam DR-05, no effects.