Wednesday, May 17, 2017
In this video I am showing what the DRE4MTR4CK sequencer module does best: dealing with fast incoming clock signals. With the DRE4MTR4CK I change octaves and patterns for each part, and rotate the track data.
Track 1: Synthesizer Box
Track 2: DNA Symbiotic Waves going to the JP-6 VCF
Track 3: Disting Osc going to Doepfer SEM filter
Tracks 1-3 going to Deflector Shield Phase Shifter and Big Sky
Clock randomization by 4MS RCD, getting its data rotated by Pittsburgh Toolbox S/H.
Track 4: Bass Pads by Juno-1 played off-camera (right hand), my own patch called Aurora Pad 2.
Monday, May 8, 2017
Today I am messing around with a vintage Ensoniq EPS 16 Plus sampler. These were made around 1990 (27 years ago!) and are an excellent crunchy sampler alternative to Akai S-900 and E-mu Emulator. For this video I sampled an ARP Solina String Ensemble. This is less of a tutorial and more of a comparison. Does the sampler do the Solina any justice? Check it out and see. Be sure to click 'LIKE' and thanks for watching.
Thursday, April 27, 2017
In this video I show what I did to resolve my power supply issues on the Oberheim Matrix-12 analog synthesizer. Symptoms were intermittent non-boot, locking up, and the dreaded Voice 1 Processor Malfunction message. Along the way I'll talk about how the power supply works and how it is different than many synths from the era prior to this. Even though the Oberheim Xpander is a little different than the Matrix-12, its power supply works exactly the same. This may not enable you to fix your Matrix-12/Xpander completely, nor answer ALL questions you may have...but hopefully it will be helpful information.
YOU ASSUME ALL RISK WHEN REPAIRING YOUR OWN ELECTRONIC INSTRUMENTS! There's no shame in asking a friend for help or taking it to a reputable synthesizer technician. BE SURE TO UNPLUG THE SYNTH PRIOR TO DOING THIS KIND OF WORK.
1:10 Getting Started
1:54 Dealing with an SMPS
3:16 Why did Oberheim use an SMPS?
3:40 Why I'm NOT going to troubleshoot this power supply
4:38 Power Supply Restoration and Results
Here are the Mouser parts numbers:
Power Entry Module - 871-B84771A0001A000
2W Shunt Resistors 0.1ohm - 667-ERX-2SZGR10V
sorry I don't have capacitor numbers, I did that work 2 years ago
Monday, April 24, 2017
The Oberheim Matrix-12 was cooperating today, so I thought I better make a video before something happens again. Using some reverb and delay, recorded direct and no audio post processing.
Monday, April 10, 2017
Rolling out some new patches for the Juno-1/2 available on my download post for this blog. A full bank of patches including the sounds from Demo #1. In this video I have selected a few of my personal favorites: bass, arpeggios, and soundscapes/pads. There are copious amounts of Big Sky reverb, a couple of sounds use the Timefactor delay. Basses don't usually need anything. Sounds were programmed using the indispensable Stereoping synth controller, also used briefly in this demo. Recorded direct through a Mackie 802-VLZ mixer to a Tascam DR-05.
0:00 Cloud Bank
0:56 Aurora Pad 2
1:14 Bass Arp 01
2:14 Mod Bass
2:25 Juno Crush
2:37 Alpha Synth
2:51 Micro Fab
3:24 Bass Pedalr
3:35 Mono Bass
4:10 Synth Mutes
4:25 Fake Wurli
6:07 Psycho Sweep
6:32 Pure Space
Tuesday, April 4, 2017
Designing a module such as this has its challenges. Things happen when you are designing a module on your own, and building it with your own two hands. Just last week I thought the project was dead in the water. But I persevered once more. I have risked everything, all my cards are on the table. The DRE4MTR4CK has been my labor of love for over 2 months in the making. With hard work, persistence, and steady dedication the DRE4MTR4CK is now a reality. An organic melody progression sequencer, with polyrhythmic capability.
Performance using evolving chord changes with my custom DRE4MTR4CK Euro module. It has 4 independent tracks of polyphonic pitch control:
Track 1: Pittsburgh Synth Box, internal filter
Track 2: DNA Symbiotic Waves, JP-6 Filter clone
Track 3: Disting MK3, Doepfer SEM filter
Track 4: Rings, no filter.
Clocking direct to envelopes, triggering pitch changes manually. Track 1 pitch CV is going through a PM Toolbox slew limiter. Mix is going to Timefactor delay. Recorded direct through a Mackie 802 to a Tascam DR-05.
Sunday, April 2, 2017
The DRE4MTR4CK is a simple and intuitive Pitch CV sequencer. It has 4 steps, and it has 4 Individual tracks. Each track has its own clock input, clock output, and Pitch CV output. In this way, it can behave like 4 completely independent sequencers.
In this video I show how to use the DRE4MTR4CK in more detail.
1:23 Installation Options
Correction: the graphics say -5v when it should say +5v (positive 5v).
3:06 Boot-Up Defaults
3:32 Connections and Operations
DRE4MTR4CK is a custom module built by hand. Full specs available on my previous post.
Monday, March 20, 2017
The DRE4MTR4CK is my custom Eurorack module that has been two months in development. DRE4MTR4CK is a simple and intuitive Polyrhythmic Organic Melody Progression Sequencer in a mere 12HP.
It has 4 independent, externally clocked tracks with 4 steps each. Each track sends pitch CV to one of your VCO modules. With external clocking, you decide if timing is slow and dreamy, bouncy and up-tempo, or all out fury going into audio rates.
Unused clock inputs are multiples from input 1. Clocking can be interrupted for a track by inserting a floating patchcord. Manually trigger a track step using the TRIG buttons. Intuitively build evolving chords or poly-rhythmic note progressions.
Simple pattern modes and Octave transpose for each track provide seemingly endless note progression. Mix things up with Step reset and track data Rotate to re-circulate CVs among your VCOs. 16 memories are provided for program note data storage. Recall of programs during performance provides changes in melodic or chord structures on-the-fly.
***** SPECS ******
4-steps per track
Chromatic Scale Note Quantization
4x4 LED Matrix
EACH TRACK has
- 1 external clock input.
- 1 duplicated, unbuffered clock out signal for clocking other devices
- Independent Pattern selection: Forward/Reverse/Forward-Reverse/ZIGZAG
- pitch CV output 1v/oct over 5v range
- Octave Transpose +/- 2 octaves selection
- Store/Recall 16 non-volitile memories in EEPROM
- Note programming on a per-step basis
Clocking Behaviour Options
- Unused clock inputs are duplicated from input #1
- Interrupt clocking by inserting a floating patchcord
- Manual trigger sent to clock out using the TRIG buttons
- 1 Data Pot
- 12 Momentary Buttons
- 16 LEDs
Memory and Processing
- 16 non-volatile memories in EEPROM for note data
- Processing Speed: 20MHz
INPUT 1/8" MINIJACKS
- 4 clock inputs
- 1 control input for RESET
- 1 control input for ROTATE
OUTPUT 1/8" MINIJACKS
- 4 unbuffered clock outputs (multed from inputs) + manual trigger
- 4 buffered 1V/oct pitch CV outputs, each 0-5v
Internal Clocking: none
External Clocking: 4 inputs
SIZE: 12 HP (60.60mm) Eurorack format, 3U high
Accepts standard keyed 2x8 (16-pin) eurorack ribbon cable (included)
- Option #1. (default) uses 5v input from your system power supply (if provided)
- Option #2. Draws power from +12v line. Requires Maxim Integrated
700-REF02CP 5v regulator (sold separately)
MEASURED CURRENT DRAW
Option #1 (default): 5v from Euro Power
+12v @ 3 mA
-12v @ 3 mA
+5v @ 103 mA Peak, 5 mA typical
Option #2: 5v from REF02 chip
+12v @ 64 mA Peak, 8 mA typical
-12v @ 3 mA
The DRE4MTR4CK module has no affiliation with any persons with similar name.
Sunday, March 19, 2017
This track is called Day DRE4M In Electric Space, video is a teaser of a Eurorack module that I designed. The module is in the top row obscured by other things, where a bundle of patch cords are going. I am using a Timefactor delay also in this one. Recorded direct to Tascam DR-05.
Tuesday, March 7, 2017
For the past two months I have been designing something mysterious and interesting. In this somewhat misleading teaser video I am tweaking its extreme aspects, a series of acid tests meant to discover its limits. The design intent is quite different from what you see here. It will still do these things if that's the sort of things you are into. I hope to have more to show very soon. Stay tuned.
Monday, February 27, 2017
Tuesday, February 21, 2017
Just kick back and enjoy these wicked analog multi-mode filter sounds. Lots of little sweet spots on this filter, if you skip around you might miss something really good. It definitely has that Roland sound.
Today I am demonstrating the Jupiter-6 filter clone I just finished building. See demo #1 for all the details. Basically the circuits and chips are the same as demo 1 breadboard test, just now they are stuffed into a 10HP eurorack module w/ some illuminated sliders.
Tuesday, February 7, 2017
This video demos a Roland Jupiter-6 synthesizer clone filter VCF. This breadboard build took two days, and for me is the largest one I've built yet. Does this circuit sound as good as the original? You be the judge. Anyway, I really wanted to hear what it sounded like before deciding about building my own module.
I came across schematics for the Roland Jupiter-6 at amsynths.co.uk. They actually sell completed modules and PCBs, however they seem to be perpetually out of stock. This will be a nice companion multi-mode filter to go next to my SEM module. IMHO the SEM sounds buttery and creamy, and the Jupiter-6 is a complete savage with outrageous low end.
The details: The sound source is the Pittsburgh Modular Synthesizer Box. I like to use a pulse wave w/ variable pulse controlled by LFO. The Synth Box filter is wide open, its envelope is passed to the JP-6 CV input #1. I don't have switches hooked up to the filter modes, so I'm pulling/resetting jumpers on the breadboard to achieve that. In this video I also crank the VCO to overdrive the pre-filter INPUT on the filter clone. I don't think you can do this on the original Jupiter-6, but you CAN push the post-filter VCA level into distortion much of the time.
Tuesday, January 24, 2017
I've been down w/ hay fever, but inspiration struck in the 11th hour last night. Right after I tweeted about not feeling the groove. Haha. This downtempo track starts with the ideas from my last demo about sequential switches. I build on that patch idea by adding TR-8 beats, and a Sampleslicer loop fed by a phrase played on the Juno-1. Using a little bit of Big Sky reverb and Timefactor delay. This track is doing everything live in one go, so there will be happy accidents along the way. Sequencing on the Arturia Beatstep Pro, and also for triggering different loop start points on the Sampleslicer. Influences by Underworld, Royksopp, and ???
Tuesday, January 10, 2017
I spent this past week building a Sequential Switch module for my Eurorack. In this video I talk about what a Sequential Switch can do, and then I demo a patch I made. If you haven't seen it already check out Mylarmelodies excellent demo using a Sequential Switch to change up melody progressions on the fly at https://youtu.be/QbxaWluHXEU
After watching his video I KNEW the Sequential Switch was damn cool and I HAD to build one for myself. It works by taking each input trigger pulse, and sequentially advances one of 4 signals to be routed to a bi-lateral destination. Mine is a clone, functionally anyways, of the Doepfer A-151. Although I found the schematics elsewhere. I generated a circuit board layout in Osmond Cocoa, made a prototype PCB and populated it for my own learning experience. It turns out the a Sequential Switch can do more than pass control voltages around, it can deal with audio signals as well.
Tuesday, January 3, 2017
Audio track Bright Sky At Midnight c.2017 by G-Storm Electro
This track was inspired by a strange dream. The subconscious was aware it was late night, yet there was the persistence of daylight. To resolve this, many unusual things were born. City light noise, meteor showers, lightning, and aerobatic displays by fleets of UFOs. The air was electric. Afraid and mesmerized at the same time, I didn't want to wake up.
Other Percussion DNA Symbiotic Waves
Arpeggios Pittsburgh Synth Box
Sequencing Beatstep Pro
FX RE-20, Big Sky, Timefactor
DAW Cubase SX3