Creakbox

Creakbox free software-synthesizer by Bioroid

Creakbox is a free software synthesizer developed by Bioroid. Available format(s): VST for Windows, macOS.

Creakbox Bassline is a 303 like mono synth with a built in sequencer.

Features:

  • 1 oscillator (Square/Saw).
  • Resonant filter.
  • Envelope mode & Decay.
  • Accent.
  • Slide(Glide).
  • Step sequencer with a 5 octave range (Can be set to a BPM (40 – 300) or to Sync with your sequencer).

http://www.bioroid.com/vst/

Cosmo Girl II

Cosmo Girl II free software-synthesizer by Elogoxa

Cosmo Girl II is a free software synthesizer developed by Elogoxa. Available format(s): VST for Windows.

New version of the old Cosmodelia’s synth of the same name. With a fresh GUI, 64 presets, automation of all parameters and also denormalization filter.

  • 3 Voices Polyphony.
  • 1 Standard Oscillator plus 1 LFO, each one with 7 selectable waveforms, and both controlled by a single VCA.
  • Several filtering options, with control over pitch, modulation and resonance.
  • Crusher and Echo units built in.
  • Includes 64 Factory Presets.
  • Fully automatable via MIDI Standard Controls.
Made with SynthEdit

http://www.uv.es/~ruizcan/p_vst.htm

Cooly

Cooly free software-synthesizer by PQN Audio

Cooly is a free software synthesizer developed by PQN Audio. Available format(s): VST for Windows.

Cooly combines a classic analog style oscillator with a SoundFont oscillator to produce cool pads and more.

Features:

  • Osc1 has 7 waveforms (sin, saw, ramp, triangle, pulse, white noise et pink noise) and is connected to a 4-pole resonant low-pass filter. The cutoff frequency can be modulated by an LFO.
  • The filter has a dedicated envelope (ADSR).
  • Osc2 has 6 waveforms (attack, brass, organ, string, analog, perc).
  • The 2 oscillators share the same amplitude envelope (ADSR) but you can adjust the volume of each oscillator separately.
Made with SynthEdit

http://pquenin.free.fr/pqnaudio/

Coolblue

Coolblue free software-synthesizer by K.o.m.p.

Coolblue is a free software synthesizer developed by K.o.m.p.. Available format(s): VST for Windows.

Features:

  • Two oscillators with separate pitches.
  • 14 different waves.
  • Special resonant decay.
  • Velocity control for VCA and filters.
  • Tube distortion.
  • 303 type glide (only for step seq).
  • Up to 16 step sequencer.
  • 4 different patterns per patch.
  • 64 patches.
Made with SynthEdit

http://www.spectrakomp.net/

Cobalt

Cobalt free software-synthesizer by Sanford Sound Design

Cobalt is a free software synthesizer developed by Sanford Sound Design. Available format(s): VST for Windows.

Cobalt is a VSTi software synthesizer inspired by many of the digital synthesizers from the 1980s.

In the early 80s as digital technology became cheaper, many manufacturers designed synthesizers that combined earlier analog technology with newer digital technology. These were known as hybrid synthesizers. Well-known hybrid synthesizers are the Korg DW8000 and DW6000, the Ensoniq ESQ-1, and the Kawai K3.

In analog/digital hybrid synthesizers, the oscillators responsible for generating waveforms are digital while the filter section remains analog. This approach freed designers to use any kind of waveform; they were no longer restricted to traditional analog waveforms such as sawtooth, triangle, and pulse. However, by using an analog filter, these synthesizers retained the warmth earlier analog synthesizers were known for.

Though Cobalt is a purely digital synthesizer, its overall architecture is very much like those early hybrid synthesizers. It features a wide selection of waveforms, most of which were resynthesized from actual hybrid synthesizers, while providing traditional subtractive synthesis capabilities for sculpting its sound.

Key Features:

  • GUI created by grymmjack.
  • 26 waveforms – many of which were resynthesized from 80s hybrid synths.
  • Flexible modulation routes.
  • Apply PWM to any waveform.
  • LFO delay.
  • Polyphonic Portamento.
  • Key tracked envelopes.
  • Rich overdrive effect based on a custom algorithm.
  • Stereo delay effect with MIDI synchable delay times.
  • Easy to use.

http://www.lesliesanford.com/

CM-505

CM-505 free drum-machine by Computer Music

CM-505 is a free drum machine VST plugin developed by Computer Music. Compatible OS(s): Windows, macOS.

  • 12 Pad Drum Synth.
  • One Stereo, six Mono Outputs.
  • Generates its own waveforms.
  • Built in distortion and Bitcrusher.
  • OSX compatible carbon version.
  • Developed in conjunction with Linplug

http://www.computermusic.co.uk/

CM-303

CM-303 free software-synthesizer by Computer Music

CM-303 is a free software synthesizer developed by Computer Music. Available format(s): VST for Windows, macOS.

  • TB303 alike.
  • CM303 uses the same engine as the Muon Tau Bassline Mk2 but lacks the assignable MIDI controllers and “Accent” features and has a different GUI.
  • Developed by Muon Software

http://www.computermusic.co.uk/

Cloud

Cloud free software-synthesizer by Dario Lupo / Daze

Cloud is a free software synthesizer developed by Dario Lupo / Daze. Available format(s): VST for Windows.

Cloud is a 3-Morphing-oscillator synthesizer with a bitcrusher for each OSC, a Filter, 4 LFOs and the Automorph section where you have 4 LFOs to morph waveforms automatically, a Stereo Enhancer, Delay and Reverb effects.

Made with SynthMaker

http://www.dazesounds.com/

Clavia Lab

Clavia Lab free software-synthesizer by Simple-Media

Clavia Lab is a free software synthesizer developed by Simple-Media. Available format(s): VST for Windows.

Clavia Lab is a hybrid analogue and physically modelled electric piano.

Features include:

  • Control over source tone and resonance.
  • Complex comb filter style delay model used.
  • Separate amp control.
  • Various controls for modulation.
  • 8 note polyphonic.
Made with SynthEdit

http://www.simple-media.co.uk/vsti.htm

Clavdium

Clavdium free software-synthesizer by Fsynthz

Clavdium is a free software synthesizer developed by Fsynthz. Available format(s): VST for Windows.

Clavdium is a “Fast Additive” synthesizer plug-in.

Highlights are:

  • Low CPU consumption while the sound being dense, vivid, rich in spectrum.
  • Compact GUI with tool tips on controls.
  • Distortion (no “digital dirt” even for maximum level).
  • 5 different stereo-spreading tools (may be used simultaneously): multipan, distortion, shift, flanger, LR-echo -plus one “stereo-downmixing” effect: rotor.
  • Special mode: “longer notes – longer release”.
  • Frequency modulations (with “auto” mode) and more…
Made with SynthEdit

http://www.fsynthz.com