16.2 MB

A finite-difference time-domain physical modelling synthesiser.

1. Model
PartialString simulates the vibration of a plucked string by numerically solving the one-dimensional wave equation in real time using the finite-difference time-domain (FDTD) method. The string is represented as a list of displacements in memory. A lower note requires a longer string, which needs more points to represent it. You can then excite the string at any point along its length, and the FDTD scheme will compute how that change in displacement propagates. A pickup measures the displacement at a chosen location, and this generates the audio output. 10-voice polyphony is supported (up to 10 simultaneous strings), but this is dynamically adjusted based on your computer’s capability and the lengths of the string being simulated.

2. Controls
You can set the position and shape of the excitation, both velocity-sensitive. An LFO can sweep the pickup position, up to audio rate for AM-like sidebands. The string’s decay time is adjustable, with or without dampers applied. The dampers can behave like a piano’s, closing when a note ends. Combined with a long undamped decay, this makes pad-like sounds. Reducing the simulation accuracy generates unrealistic, soft and inharmonic sounds. Accuracy can be set constant for all notes, or proportional to string length (which can help prevent CPU overload on less-capable machines).

3. Performance
Simultaneously simulating many low notes (long strings) accurately is quite computationally intensive. On less capable computers, PartialString will automatically limit the number of sounding voices to prevent CPU overload, and this is indicated on the UI. You may notice that the synth behaves monophonically in low registers.

There is an option to prevent too-low notes (those estimated to cause overload on your machine even when played monophonically) from sounding, or to automatically pitch them up an octave or two to maintain performance. This option only takes effect when the synth is being used in real-time (i.e. not when your DAW is bouncing or freezing tracks).

On Apple Silicon Macs (M-series), running an Intel-based DAW forces the plugin to run through the Rosetta 2 translation layer, which can significantly reduce CPU performance. For the best results, ensure you install and run an Apple Silicon native (or ‘Universal’) version of your DAW.

Visit Developer Site

PartialString.1.0.3  (16  MB )

730 MB / 980 MB

Twisted, dark, and Inspiring Instruments

Psychedelic Keys is a custom-designed VST library created to spark new levels of creativity with dark, strange, yet deeply musical sounds. Every instrument in this collection was crafted from scratch and processed through high-end analog hardware, lush reverbs, and precision EQs—resulting in a unique and immersive psychedelic sound palette. Each instrument is multi-sampled with detailed velocity layers, delivering dynamic and expressive performance right out of the box.

Whether you’re scoring, producing experimental beats, or pushing boundaries in modern music genres, Psychedelic Keys offers a fresh arsenal of sonics that stand out.

Inside the Plugin:
Deep Bass, Sub, and 808s
FAT Analog Synths
Eerie Bells & Melodic Tones
Dark Psychedelic Pads
Textured SFX & Atmospheres
Authentic Vinyl Noise (recorded from real records for raw, dusty texture)

If you’re looking for something truly different—something that’s dark, twisted, and still musical—Psychedelic Keys is your next secret weapon.

Compatibility:
MAC OS (HIGH SIERRA – LATEST OS VERSION)
APPLE INTEL PROCESSORS
APPLE SILICON M1 – M4
WINDOWS PC (XP – 11)

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Psychedelic Keys-WiN  ( 297 MB )

Psychedelic Keys-MAC  ( 939 MB )

670 MB

An intimate upright piano recorded in Dartmoor, UK.

The original piano – use the mic controls to quickly fade between 5 sets of studio microphones. Recorded with precision
use the mic controls to get the perfect blend for your mix. Studio quality – recorded at Shearwater Studios, the piano has been sampled by professional engineers.

dial in the perfect sound
use the mic controls to get the perfect blend for your mix.

basic mode
use the ‘clarity’ and ‘room’ macros to quickly dial in the right sound.

tasteful FX
use the tone-sculpting controls to spice up your piano playing.

tone
adjusts which note samples are picked, repitching the piano in real-time.

modern UI
mouse-friendly design by imagiro paired with beautiful illustrations by funilab.

velocity curve editor
change the plugin’s velocity curve to suit your own keyboard.

microtuning
play to any scale you please. supports Scala files & MTS-ESP.

Lite version includes:

piano sound set
tone control
velocity curve
microtuning support

Sample data file included. However – plugin could download it itself from the Imagiro website.
Place its contents directly into your sample data folder (if installing offline/manually)

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Imagiro.Shearwater.Piano.Lite.v1.0.8.WiN.macOS  ( 670 MB )

27 MB

Violin One – The Power of Physical Modeling

Unlike the Hybrid Modeling technology used in many of our other instruments, Violin One combines physical modeling with behavior modeling. This results in a smaller footprint and excellent playability.

A standout feature of Violin One is its support for MIDI 2.0 and MPE, offering users an entirely new way to interact with the instrument through their devices. The higher resolution of MIDI 2.0 provides more precise control over the sound, along with numerous advantages when used with the latest MIDI 2.0-compatible keyboards and controllers.

Violin One is a virtual instrument with great potential, and we’re committed to continuously improving it. We greatly value user feedback—it’s the driving force behind the evolution of Violin One.

Key Feature

Physical Modeling technology with a small size (20MB)
Embodied Microphone Modeling and 3D panner Effect Unit
Support latest MIDI 2.0 and MPE
Behavior Modeling on different techniques
Provides VST3 Version （Now only Windows Version, as Mac Version now need signing and notarize, it will take more time

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ViolinOne-v0.98  ( 27 MB )

602 MB

Piano One comes from the Yamaha C7 concert grand, a true workhorse in the professional piano world, appearing on famous concert stages, in international competitions and in prestigious music events throughout the world.

By utilizing the Sound Magic Latest Neo Piano Yosemite Hybrid Modelling Engine, Piano One offers latest piano sound powered by MIDI 2.0 and modeling technology

In this new version, we introduce our first full-featured, commercial-grade piano model—offered completely free of charge and designed solely to deliver an uncompromised piano sound.

Product Features
VST on Windows (32Bit&64Bit) and VST and AU on Mac (32Bit&64Bit)
Neo Piano Hybrid Modeling Engine (Limited Features)
Yamaha C7 Sound (Vintage Upright in Piano One SE)
Note duration is limited within 18 seconds
Some features like resonance is missing

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Piano1-v7  ( 557 MB )

107/141 MB

Darksichord 3 Lite is a Harpsichord virtual instrument plugin for DAWs and other plugin hosts on Windows and macOS.

Darksichord 3 Lite is sourced from the 3 sound layers that made up the original version, but now comes with different textures and nuances for a much darker sound and more character.

The interface is user-friendly and straightforward with ADSR amplitude envelope, LFO modulation, lowpass/highpass filter cutoff, and global tune. New effect modules were added – delay, distortion, and reverb, each of which comes with typical controls and parameters.

From the new Layers section, the level of each layer (Sub, Harpsichord & Organ) can be controlled separately, allowing for in-depth tone shaping.

Darksichord 3 Lite is aimed at all popular genres such as Pop, Hip Hop, Trap, EDM, House, but also for Cinematic production, filmmakers, and sound designers. With its dark tone, it is perfect for darker and gloomy productions.

Darksichord 3 Lite is available in VST/VST3/AU plugin formats for Windows and Mac (64 bit)

Features:

3 sound layers for in-depth sound shaping: sub-bass, harpsichord and organ
LFO modulation controls
Lowpass/highpass filter cutoff
ADSR envelope controls
Global tune
Built-in vintage reverb
Built-in distortion
Built-in delay

System Requirements on Windows:

Windows 8.1/10/11
180 MB Disk Space
200 MB Ram
VST or VST3 host (64-bit)

System Requirements on Mac OS X:

OS X 10.14 And Above
180 MB Disk Space
200 MB Ram
AU or VST host (64-bit)

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DARKSICHORD 3 LITE WIN VST3-VST 64BIT  ( 132 MB )

DARKSICHORD 3 LITE MAC VST3-VST-AU 64BIT ( 142 MB )

255 MB

GAUZY KEYS WITH ANALOG CHARM

Dusty Felts breathes new life into Jon’s original Kawai Felt Piano sample. This nostalgic standalone plug-in reimagines the warm, rich character of a felted piano with a delightful vintage lo-fi charm.

Enhanced with retro elements like wow and flutter effects and adjustable amp hiss, Dusty Felts invites you to explore the beautiful imperfections of a classic felted piano. Expertly crafted to inspire your next musical masterpiece, it offers a timeless appeal that’s sure to spark creativity.

SYSTEM REQUIREMENTS
MAC OSX 11+. Intel and Apple Silicon supported. i5 or better CPU. Minimum 8gb RAM. 64 bit.

WINDOWS 7+. 8gb RAM. 64 bit.

DEDICATED PLUG-IN. VST3, AAX, AU

Tested with Cubase, Ableton Live, Logic, Reaper, ProTools, Reason 10, FL Studio, Presonus Studio One

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Prototype Dusty Felts 1.0.2  ( 255 MB )

197 MB

SynToPix Lite is a free virtual instrument with 5 multisampled presets, taken from the full version. These presets offer synthetic toy piano sounds, created by an advanced AI using real toy pianos as reference.

Features:

For Windows & Mac (64-bit)
5 Synthetic Toy Piano Presets
LFO modulation and filter controls
Adjustable ADSR envelope settings
Built-in effects: Chorus, Delay, Reverb and Distortion
Carefully edited samples
Simple and easy to use
Royalty-free

System Requirements (Windows):

Windows 8.1/10/11
70 MB Disk Space
70 MB RAM
VST/VST3 host (64-bit)
System Requirements (Mac):

macOS 10.13.6 And Above
70 MB Disk Space
70 MB RAM
AU/VST/VST3 host (64-bit)

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SYNTOPIX-v1.0.0  ( 197 MB )

292 MB / 352 MB

Atmos 3 Lite is a Free cinematic ambient piano, with 2 layers of sound with adjustable level, one layer of acoustic piano sound recorded from a Yamaha C3 and another layer of sound pads created from the same original samples, using various digital processing such as Reverbs, Morphing and Structural Effects among others.

Atmos 3 Lite is aimed at all popular genres such as Ambient, Pop, Hip Hop, Trap, EDM, House, but also for Cinematic production, filmmakers, and sound designers.

Atmos 3 Lite is available in VST/VST3/AU plugin formats for Windows and Mac (64 bit)

Features:

Windows & Mac
6 Multi-Sampled Piano Presets
2 Layers
LFO modulation controls
Lowpass/highpass filter cutoff
ADSR envelope controls
Built-in chorus
Built-in delay
Samples meticulously edited one by one
Easy to use
100% royalty free

System Requirements on Windows:
Windows 8.1/10/11
600 MB Disk Space
400 MB Ram
VST/VST3 host 64-bit

System Requirements on MacOS:
macOS 10.14 And Above
600 MB Disk Space
400 MB Ram
AU/VST/VST3 host (64-bit)

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ATMOS_3_LITE_WIN  ( 292 MB )

ATMOS_3_LITE_MAC  ( 351 MB )

x64 x86 VST3 AU AAX WiN MAC | 26 MB

KingKey is a hyper realistic sounds of a keyboard while playing ON your keyboard.

International Joke Day 2024
First came the piano keyboard, then along came the computer keyboard…
Then, you could play your keyboard with your keyboard…
NOW you can play the hyper realistic sounds of a keyboard while playing ON your keyboard.
Click, Clack, Svvvvt, B-ding, cha-cuh, fshhhh.
Let´s get King Key.

International Joke Day 2024
Gone are the days when you were left begging for high quality one-shot keyboard samples, for we at Caelum have used our incredibly intelligent minds to bring you our first sampler; King Key.

Decadence
Anywhere in the world you can now play the sounds of a keyboard, on your keyboard. We also blessed you with the sounds of a MIDI keyboard, a typewriter and 4 produced kits as our generosity knows no limits.

Character
With 9 instruments and 11 presets at your finger tips you can finally be the person your parents wanted you to be, a King Key one.

Juicy Details
Using proprietary high-detailed sampling techniques, which are sadly too complex for you to understand without demonstrative play-dough, we have captured the essence and spirit of a vintage Imperial typewriter, a Modal Cobalt8X and a Generic USB keyboard.

Effects
Transform these sounds by driving them into oblivion, reducing them into bitty chunks and spreading them into a spacious sound storm of punctuational goodness,

Product Aftercare
We cannot be held liable for any personal or spiritual awakenings after getting King Key, you are the master of your own fate and you must be held entirely accountable.

System Requirements
Windows
Requires Windows 7 or higher. VST3 & AAX (AAX is 64-bit only).

macOS
Requires macOS 10.11 or higher (64-bit only). AU, VST3 & AAX. Native Apple Silicon support.

You need to register on the developer’s site to use the plugin with free license.

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Caelum_Audio_King_Key_v1.0.0  (26  MB )