Features Demo Videos SAMPLES SUPPORT Other SDS Modules

 


Introducing a new space saving VCO!

 
5 OCTAVES @ 1V/OCT QUANTIZER WITH 16 SCALES
16 WAVEFORMS ( 3 CUSTOM DRAW, NOISE ) +/- 5V PHASE + PWM MODULATION
AD(S)R  ENVELOPE GEN. CV CONTROLLED WAVEFORM SELECT
TRUE LM13700 VCA CV SCALE ROOT OFFSET
CUSTOM WAVEFORM RECORDER CV ENV. ATTACK MINI OFFSET
NORMALIZED T/G FOR VCO STANDARD CV ENV. DECAY OFFSET
ONLY 3 HP / APPX. 42 MM DEPTH MODULATION CAPTURE (3 SECONDS)
MODULAR LEVEL OUTPUT (~10V P- P) PROGRAMMABLE TRIGGER ACTION
SETTINGS PERMANENTLY SAVED DIY KIT / MIDI EXPANSION AVAILABLE

"Digital Character, but with Analog finesse"

"Big Sound from such a Small Module!"

FEATURES

The key to such a small module having the ability to achieve so much is multifunctionality.

The T/G input can be used with gate type pulses to control the envelope / sustain time, but can be used with a short trigger to play entire envelope.
Sensitivity is 0.6 volts on the T/G input so can be triggered by unlikely sources such as a piezo transducer
The MOD input can be used to phase modulate waveforms, PWM others, or both to some combination waveforms. This is a bipolar through-zero input.
The MOD CV input can be used with it's own coarse Quantizer  to offset Scales.
The MOD CV input can be used to select any of the 16 waveforms.
The MOD CV input can offset the Attack up to 25%
The MOD CV input can offset the Decay and wrap around
All MOD CV connections can be used in any combination
The WAV knob acts as an offset when selecting waveforms, so if used to offset Scales can be shifted into a whole new sequence without affecting Scale keys.
During alternate MOD functions, a modulated waveform can continue thanks to Intelligent Modulation Capture, looping up to last 3 seconds.
The 3 top waveforms can be custom drawn using 2 of the knobs as the X-Y axis. Saved in permanent memory.
Custom waveform # 15 can be recorded into from an audio source patched to MOD input with instant preview to get that perfect waveform
Settable 0V key offset of 12 notes for Quantizer / Scales / non-Quantizer modes.
+1 Octave Setting reduces wave table size from 128 to 64 for clear sounding higher pitches
2 KHz @ 10bit sample rate on the MOD & VCO CV inputs for smooth analog like modulation response
No Digital Envelope. Real analog VCA circuit.
All settings "menus" are only 1 deep, indicated by the LED's
Set it and forget it. All settings / waveforms are permanently retained for future power-ups, ready to go.
Audio (mp3) File Firmware updates, alternate Firmware's Percussion, PureMIDI, Delay/FX/Distortion transform your SDS_VCO

Assembled and tested $130 US

Complete DIY Kit (SMD's already mounted) $ 95

MIDI Expansion Board (including patch to in-line or panel jack) +$20

Available Now! freshnel@freshnelly.com

 


 

 

VIDEOS

 

  SDS_VCO Demo 1

This video describes some of the basic input/outputs and configurations of the SDS_VCO
Waveforms, custom waveforms, and Scale selection are covered.
*"Triad" has been replaced by Octave since this video.
+1 Octave is covered, as is recording and hand "drawing" a waveform.

*Note that the Scales used in the video have changed somewhat since:
                   

  SDS_VCO Demo 2

Demo video 2 covers the new MOD controlled envelope Attack & Decay offsets,  Root 0 volts offset setting, the MOD CV recorder, and MIDI output option.

The new Waveform # 9 and Master reset are also covered.

SDS_VCO + Reflex LiveLoop

An experimental patch with the prototype SDS_VCO. The VCO is turned into stereo and reversed by sequencer control from the MI Frames which is being clocked by an output from the ModEm-1 Sequencer.

Waveforms are also being selected by the MOD input and can be offset independent of the scale root pitch. The scale is "All notes" quantized.

Another demo video is coming "oddities" ;)
 

 


 

SAMPLES

Here's a few samples of the SDS_VCO during & after development
MP3 LINKS WILL OPEN IN A NEW WINDOW, THIS IS INTENDED.

ThreeWonders.mp3

Sequencing the VCO CV and using MOD input to shift the root of the scales selected. Tweaking the envelope throughout the three pieces.
The delay is a Reflex LiveLoop to match the sequencer tempo.
test-cv-wave-key-modmem.mp3

 This demonstrates the MOD memory feature. Modulation was recorded continually up to the last 3 seconds before the MOD input switched to control the root scale offset.
The recorded modulation is then removed at 2:48, and re-enabled at 11:00.
Various waveforms are selected also by the MOD CV to demonstrate the diverse array of sounds from the waveforms.
The delay is a Reflex LiveLoop
SDS_VCO-waveModMemDemo.mp3

 Development tests trying out different waveforms, noise, modulations and envelopes.
(3rd part of 3 wonders) Starting out with string-like envelope using a slow MOD that was recorded.
MOD recorded is saved to memory and remains indefinitely while MOD input is being used for other functions:
Waveform selection, Scale Root offset, or an envelope parameter CV. Turning off the MOD record mode will preserve a previously recorded MOD input.
SDS_VCOandMIDI.mp3

With the new MIDI expansion (option added just in time for release!) CV & trigger/gate combinations will be duplicated note for note into a MIDI send. This is very complimentary and enhances GM MIDI sounds nicely.
Velocity can also be controlled via the MOD jack.

'Nuff said, have a listen!

MODattkdecay.mp3

 This sample demonstrates selection of MOD input to control Attack and/or Decay offsets. The Attack offset is usefully small, while the Decay can wrap right around at 5 V making it feasible to use the two together.
  In the sample the two knobs are fully down and the non-linear Release is about 1/3. The MOD is also controlling a Scale root key, for variety!

MODattkdecay2.mp3

 This sample is using the same setup but Wave#12 where the recorded modulation is more noticeable because of the phasing of triangles and light harmonic.
  Notice how the lower notes (lower scale offset) are always short, as they are being controlled by the same MOD input of course! If the Decay knob is turned to center, the offset will wrap and the whole thing will be inverted (high notes short)

SDS_VCO-demoSeqs.mp3

Here's a whole lot of different modulations (sine, square, adsr drops, audio) and sequences using the SDS_VCO alone (with a bit of kick drum here & there) during an experimental session.
You can hear how a percussion can be made as well.

This sample demonstrates principally the analog nature of the SDS_VCO. It's not all pretty with some of the modulations, but frequencies were stressful and yielded some pretty nifty results!

2 x SDS_VCOs-protoNew.mp3

The very first prototype SDS_VCO mixes waves with the first production module which also has MIDI in this sample.
The most SDS_VCO's I have ever had in the rack is two and if 2 sounds this good, I wonder about about 3?

Throughout this sample, I am changing waveforms in both modules, one feeding left, the other right, and MIDI all over, also being channel changed on the fly some. The sequence on the other hand doesn't change, just the scale offsets.

2VCOs-sameMOD.mp3

This (rather long) sample is an interesting experiment using one SDS_VCO on a sequencer with a gapped gate, while a second on just an LFO with every sequencer clock.
  The scales are set the same and offset by the same MOD CV (seq./16). For the most part it works as the LFO side glissando's up & down. One VCO is on each side, left & right.
  At about 3:00 I'm closing in the LFO to match the cycle, roughly, but it always moving adding variety.
  Then at 5:40, things are slowed down so you can hear the individual parts.

PercussWithFLstudio.mp3: Percussion Firmware

Here's the SDS_VCO with percussion Firmware installed synced via clock from a MIDI-CV and FL STudio. Combined with software drums adds some pizzazz to an ordinary kit! SDS_VCO's with the MIDI option will also out MIDI to ather drums (like V-Drums or software) at the same time. Drums  defined by the 16 parameters have an approximate "sister" in the MIDI world.

sdsVcoNoQuant.mp3

The SDS_VCO firmware underwent a bit of an overhaul recently (March 2018) so it generally sounds better and performs more accurately. Also some modules were experiencing issues with the higher notes, which is fixed.

Here's a sample (WAV#16) of the "new" SDS_VCO!

sdsvcoTrigFX+RITMs.mp3

Here's an SDS_VCO module being controlled by a pair of RIT_M sequencer/CV recorders while in Trigger mode. The VCO's CV in is being controlled by one RIT_M, while the other RIT_M is selecting waves and controllinga second SDS_VCO with the FX Firmware installed. The first VCO is of course being fed into the second!

 


 

SUPPORT
 

Owner's Manual

2017 DIY Build Manual   DIY MIDI Sheet

SDS_VCO Calibration Procedure

BareBoard DIY Build Manual

Percussion V.1.00 Guide

PureMIDI Beta Guide


Firmware /Alternate Firmware's

 Audio Firmware Updates
SDS_VCO Firmware Page

NEW! Percussion V.1.00 Firmware
Turn your SDS_VCO into a percussion module!
16 tunable parameter percussion sounds

NEW! PureMIDI beta Firmware
Turn your SDS_VCO into an 8 Channel
T/G & CV & knobs to MIDI Controller!

NEW! Delay/FX/Distortion Firmware Dev
This firmware underway (March 2018) turns the
SDS_VCO into an amazing little audio processor!
I have dedicated a page to it here


Q&A

SDS_VCO Q & A


Contact: sdsvco@freshnelly.com

 

 

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Last Update March 24th 2018