"Never made in large numbers, the Sequential Prophet VS is now a hugely collectable synthesizer. Made in San Jose, California in 1987 (s/n 0165), the VS was Sequentials last model before the company folded. Most of the R & D team ended up in Japan, helping Korg to produce the famous Wavestation....and they sold thousands of those.....
It all started in 1985, with Chris Meyer dreaming up the concept of Vector Synthesis. Initially tagged Prophet 2400, the name VS was eventually adopted. Basically, "morphing" among FOUR separate digital waveforms, with the 360* joystick, allows the creation of new patches (100 memories on board). There are 95 resident/32 user waveforms on board.....derived from 4 oscillators being shaped by Curtis analogue filters (but digitally controlled) ~ 4-pole lowpass, using 8-voice polyphony (+split/dual) ~ with twin chorus + agile stereo routing, all being sounded with a 5-octave velocity/aftertouch keyboard. As a bonus, there is also a versatile arpeggiator. Cosmetically, this synth is a bonny sight to behold, with lots of attractive blue switches and pleasing livery.
This particular VS (rev 1.2) has had a full service recently by a top London tech. New OLED blue display has been installed, and new buttons & switches. The keys are nigh perfect, with velocity fully working, and the channel aftertouch triggering every time. KKGB rate this beauty at 9/10. See pix showing eeny dinks on a cheek corner...thats about all the damage......"
"A look at some of the obvious and not so obvious things you can do to get a variety of sounds. Especially important is the use of LFO phase shifting, something which was introduced in firmware 1.07. It has a dramatic effect on the sound in both note reset mode and pattern sync. At the end of the video I get in some random noodlings just for fun.
0:00 Filter tracking 0:53 Filter envelope click 1:26 Random filter modulation 2:14 Vibrato 3:10 LFO filter phase 6:33 Drone mode 7:03 Sync mode filter phase 11:17 Bandpass filter 12:30 Gated chop 14:14 Clocking the gate 14:50 Pitch envelope drums 15:41 FM percussion 17:38 LFO noise drums 21:28 Random noodling
"We drive along a section California Highway 4, the John Muir Parkway, between the I-80 in Hercules and I-680 in Concord. It winds through picturesque hills in northern Contra Costa County before taking on a more suburban character around Concord. It is a major commuter route, but quite nice during off-peak hours.
Original music by Amanda Chaudhary using:
RMI Electra Piano (sample instrument in Kontakt)
Arturia Mellotron V, Stage 73 V2, Pigments 3, CS-80 V
EastWest Fab Four bass
Percussion in Ableton Live.
We went back to basics again with our twin Op-Amp designed circuit. Tuning knob will take you anywhere from deep Kick to high Tom sounds. The Decay adjustment will get you from a quick hit to a self-resonating bass drone. A ..::boom::.. button lets you preview the sound or play by finger. Gate In is sensitive enough for most triggers and a LED indicator lets you see when it booms.
Powered - 6hp (30mm)
You get exactly that... a Big Boom. You might need to become better friends with your neighbors after you install a Big Boom or 2 in your rack. Turn down the Tuning and Decay adjustments and just let it rumble. Then again its not hard to tame this beast..Tuning and Decay in the mid range makes a very recognizable and amicable kick drum sound that will drive any melody into something that will make you want to move your body. Manual trigger button on the face lets you play by finger to add just the right low end push to your creation.
Just like every Swizzle Circuits module, it comes fully assembled, tested and ready to go. Just take it out of the package and plug it in.
Big Boom EuroRack Module features:
includes power cable. Install more than one for multiple drum sounds. LED indicator shines through the face to let you see the action. Decay adjustment goes into a self-generating bass drone with wave re-triggering for rhythmic stuff. ..::boom::.. button allows you to manually trigger the Big Boom for preview or free play. Gate In is tuned to accept most CV gate triggers, sequencers and LFO signals. Swizzle Circuits custom designed PCB
Tripple Attenuator
Some of the most basic modules always turn out to be the most useful! At 8hp, this module is small enough to fit anywhere, but big enough to give you full precise control. Grab all three at the same time during a big break! The LED indicator lets you know that your signal is staged right where you want it and ready to be used. Attenuation works just as well to tame unruly LFO, envelope and other CV signals. Just like every Swizzle Circuits module, it comes fully assembled, tested and ready to go. Just take it out of the package and plug it in.
3 fully independent rows of attenuation ready for mixing and fading audio sounds or limiting CV signals. All channels include luxurious 45mm sliders with LED indicator at the tip to tell you when there is signal at the inputs. Linear range control with total cut off at the bottom and full pass through when the slider is at the top.
Tripple Attenuator Module features:
8hp (40MM) non-powered 45mm linear taper sliders with red indicator LEDs at the tip. Non-Powered to fit in anywhere. LED indicates incoming signal (audio and CV) at a glance. Swizzle Circuits custom designed circuitry and PCB
Dual Opto-Gate
Seems simple; lots of uses! Similar to Vactrol control, the analog microchip this module is built around has been used for decades to switch isolated circuits and transfer high-speed signals. We took that ability and put it into a passive module that somehow has Gating indicator LEDs that show when the Gate is ON. How did we do that? Hmm. Just like every Swizzle Circuits module, it comes fully assembled, tested and ready to go. Just take it out of the package and plug it in.
At the heart of this module is the ILCT-6 2-channel opto-isolator. Full analog gating with nothing to get in the way of your signal. Inputs can be audio signals OR CV control signals. This little wonder can gate well into the audio range allowing some simple frequency modulation. Gating signals can come from an LFO, envelope, or sequencer.
Module Features:
- 2 fully independent Gating channels. - Non-Powered; fits anywhere. - Gate ON indicator LEDs on each channel. - Very minimal Gate ON resistance. - Capable of Gating into the audio range for frequency modulation - Gating follows LFO or envelope shape. Swizzle Circuits custom designed PCB and circuitry.
"Electrolytic capacitors have been replaced and it is in very good working condition. There is a drop out box that has cv/gate inputs, filter cv input with in/out switch and audio output on 1/4 jacks.
On the left side three toggle switches have been installed: 1) CV/GATE internal/external 2) Filter ENV Time (ultra-fast/normal) for audio rate filter modulation 3) Filter cutoff key follow full/off/half
The tuning after the warm up period (approx. 10 minutes) is quite stable. All keys work fine.
The cover is custom made from plywood and painted."
"Never made in large numbers, the Sequential Prophet VS is now a hugely collectable synthesizer. Made in San Jose, California in 1987 (s/n 0165), the VS was Sequentials last model before the company folded. Most of the R & D team ended up in Japan, helping Korg to produce the famous Wavestation....and they sold thousands of those.....
It all started in 1985, with Chris Meyer dreaming up the concept of Vector Synthesis. Initially tagged Prophet 2400, the name VS was eventually adopted. Basically, "morphing" among FOUR separate digital waveforms, with the 360* joystick, allows the creation of new patches (100 memories on board). There are 95 resident/32 user waveforms on board.....derived from 4 oscillators being shaped by Curtis analogue filters (but digitally controlled) ~ 4-pole lowpass, using 8-voice polyphony (+split/dual) ~ with twin chorus + agile stereo routing, all being sounded with a 5-octave velocity/aftertouch keyboard. As a bonus, there is also a versatile arpeggiator. Cosmetically, this synth is a bonny sight to behold, with lots of attractive blue switches and pleasing livery.
This particular VS (rev 1.2) has had a full service recently by a top London tech. New OLED blue display has been installed, and new buttons & switches. The keys are nigh perfect, with velocity fully working, and the channel aftertouch triggering every time. KKGB rate this beauty at 9/10. See pix showing eeny dinks on a cheek corner...thats about all the damage......"
