MATRIXSYNTH: The OCS-2 One Chip Dual VCO Synthesizer with 15 Different Waveforms

Monday, April 11, 2016

The OCS-2 One Chip Dual VCO Synthesizer with 15 Different Waveforms


OCS-2 VCF_demo from chnry on Vimeo.

The OSC-2 is in eurorack format but can be used as a stand alone desktop synth. Four versions are planned, two stand alone and two eurorack. It's based on the Arduino due and can actually run off of a 9V battery for portability.  You'll find additional details with the pics further below.   Directly below is the description for the video above, followed by a second video and description.

"Sound of the VCF OCS-2 synthesizer. A sawtooth waveform at constant frequency is pass throw the VCF. The VCF cutoff is changed via a LFO.

the resonance factor (Q) is manually adjusted during the recording."


OCS-2 VCO_demo from chnry on Vimeo.
This video demonstrate the sound of one VCO of the OCS-2 synthesizer. The sound did not pass throw the VCF,VCA.

Warning: There are some super high frequencies in this one so be careful with your audio levels. It's left channel only as well.

"The frequency is changed thanks to a LFO.

the 15 waveforms of this VCO are demonstrated one after the other."



And some info via http://chnry.net/ocs/ where you'll find additional pics, info and audio demos:

"OCS-2 is an analogue style synthesizer. Small, but very powerful and flexible, it provide an incredible sound quality.

Dedicated to both keyboard player and knob addict, this synthesizer is full of feature that define it’s own unique sound.

Why is it so special?

First, the sound quality is impressive : this is not a cheap 8 or 16 bits synthesizer : it implement state of the art audio synthesis algorithm.

OCS-2 provide lot’s more than the essential of a modern dual oscillator monosynth. Original waveform, shape morphing LFO, there is a lot of unique feature :

30 control knobs
Few atypical waveform with incredible fat sound
LFO that can continuously change waveform
A CV GENERATOR with different algorithm to generate random to rhythmic modulation
4 audio effects
A very powerful digital connection matrix
A light sensor to control sound with hand gesture
Customizable and possibility for software update
Very compact
Incredible sound quality
What is inside?
2 VCO providing 15 different waveform
1 VCF (multi-mode, including a 24db/Octave low pass resonant filter)
1 VCA
1 ADSR
3 LFO (2 with configurable waveform, 1 with CV frequency control)
1 custom CV GENERATOR with 4 different algorithms (Attack Release, dual LFO, Random, Non Linear)
1 audio effects processor with 4 different effect (Distortion, delay, bitcrush, waveshaper)
1 ring modulator
1 CV controlled MIX (for VCO1 and VCO2)
2 octaves keyboard with portamento
1 digital matrix to connect CV to modulation fader
1 Stereo line-IN with envelope follower and gate control
1 MIDI input (note / velocity / pitch wheel / modulation wheel / control change)
3 analog CV IN and 1 GATE IN
1 light sensor

Why will you love it?
Since it is very small, you can carry this synthesizer everywhere. You can even use a 9V battery as power supply. With an embedded audio multi-effect, you don’t need anything else!

But this synthesizer can also adapt to your setup: add a midi keyboard and your ready for endless jam.

OCS-2 is also perfect as a computer complement : prepare some midi loop and use them in combination with the modulation faders as CV controls.

With a line audio input, 3 analogue Control Voltage In, and one 0/5V Gate IN, OCS-2 can also be a great addition to your modular setup.

The extensive number of physical control allow an easy and effective sound tuning. 30 faders intent a direct access to all sound parameters, so you can only focus on the music.

The light sensors is also a great for music expressiveness : use the shade of your hand to control your sound! Your performance on stage will never be the same thanks to this feature. This is also attractive for studio work since it introduce a very different control than a fader rotation."

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