131 MB

Six Sines is a small synthesizer which explores audio rate inter-modulation of signals. Some folks would call it “an FM synth” but it’s really a bit more PM/AM, and anyway that’s kinda not the point. At the end of 2024, I was in a bit of a slump dev-wise for a variety of reasons and wanted a small project to sort of jump-start me for 2025. I had watched Newfangled Dan ship obliterate from idea to loved plugin in November, and I thought hey can I do the same in December

As I wrapped up 2024, I also wanted to take account of how well our project to factor code into libraries went and make a sort of todo-list of why it was hard to build a synth. This includes some insights into the sst- libraries and the clap-wrapper

Another indie audio dev, who asked to not be named here in case this sucks, which it doesn’t I dont think, said to a group of users in a discord in an offhand way something like “the least commercially viable thing is a 6 op full matrix pure FM synth”. So my response was 1. implement one, 2. give it away, 3 ???, 4. you know the meme.

It seemed fun, and I thought some people would download it.

It had been in my head for a while and I wanted to hear how it sounded

Visit Developer Site

six-sines-win-1.1.0  (59  MB )

six-sines-macOS-1.1.0  ( 126 MB )

six-sines-linux-1.1.0  (38 126 MB )

37 MB

Image-In is a polyphonic synthesizer that generates sound by scanning an image. It uses a form of wave terrain synthesis where the brightness of an image’s pixels is interpreted as an audio waveform. The path used to scan the image is defined by three independent “Readers”, each tracing an elliptical shape.

The shape, position, and orientation of these ellipses can be freely adjusted and modulated by a flexible system of LFOs and ADSR envelopes. This allows for the creation of complex, evolving timbres and rhythmic patterns derived directly from visual information.

Features
Image-Based Synthesis: Load any PNG or JPEG image to use as a sound source. The visual characteristics of the image directly influence the timbre of the sound.
Triple Ellipse Readers: Three independent readers scan the image, each with its own set of parameters (position, radii, angle, volume, pan, detune). Their outputs are mixed together to form the final sound.
Extensive Modulation:
4 LFOs: Each with multiple waveforms, tempo-sync capability, and phase control.
3 ADSR Envelopes: For shaping the amplitude and other parameters over time.
A comprehensive modulation matrix allows you to route LFOs and ADSRs to almost any reader parameter, including its geometry, volume, pan, and filter settings.
Per-Reader Filtering: Each reader has its own multi-mode filter (Low-Pass, High-Pass) to further shape its sound.
Interactive UI:
An interactive display shows the loaded image and the reader paths.
Drag handles directly on the display to manipulate the center, radii, and angle of the ellipses.
Real-time visualization of parameter modulations.
Preset System: Comes with a set of factory presets and built-in factory images to get started.
How to Use
Load an Image:

Use the “Image” dropdown menu at the top left to select one of the built-in factory images.
Click the “Load…” button to open a file dialog and select your own image from your computer. Darker areas of the image produce lower sample values, and brighter areas produce higher values.
Activate a Reader:

The plugin has three readers, accessible via the “Reader 1”, “Reader 2”, and “Reader 3” tabs.
By default, only Reader 1 has its volume turned up. To hear the other readers, go to their respective tabs and increase the “Volume” knob.
Shape the Sound:

Directly on the Display: Click and drag the colored handles on the image display to change the position (center handle), radii (outer handles), and rotation of each ellipse.
Using the Knobs: Use the knobs in the “Reader” tabs for more precise control over the ellipse geometry (CX, CY, R1, R2, Angle), Volume, Pan, and Detune.
Add Movement with Modulation:

LFOs Tab: Configure the four LFOs. You can set their waveform, speed (Freq), and phase. Use the Sync button to lock the LFO rate to your DAW’s tempo.
ADSRs Tab: Adjust the three ADSR envelopes. ADSR 1 is the primary volume envelope by default. ADSR 2 and 3 can be used as modulation sources.
Assign Modulation: In each “Reader” tab, below the main parameter knobs, you’ll find the modulation controls. For each parameter (e.g., “CX”), you can select a modulation source (e.g., “LFO2”) and adjust the modulation Amount.
Filter the Sound:

In each “Reader” tab, the Filter section allows you to apply a filter.
Select a Filter Type, and adjust the Filter Freq (cutoff/center frequency) and Filter Q (quality/resonance). These can also be modulated.
Final Touches:

Use the “Master Volume” slider at the bottom left to control the overall output level of the plugin.
Click the “OpenGL” button to toggle the hardware-accelerated display for smoother animations on supported systems.
Controls Overview
Main Display
Image Display: Shows the currently loaded image.
Reader Paths: Visualizes the three elliptical reader paths.
White Path: The unmodulated, base path for each reader.
Yellow Path: The real-time, LFO-modulated path.
Colored Paths (per-voice): The final, active path for each synth voice, including all modulations.
Handles: Colored squares on the display corresponding to each reader. Drag them to edit ellipse parameters.
Top Bar
Image: Dropdown to select a factory image.
Load…: Button to load a custom image.
OpenGL: Toggles the OpenGL renderer for the display.
Import/Export: Buttons to load/save the plugin’s entire state to an XML file, useful for sharing patches.
Tabs
Reader 1/2/3: Controls for each elliptical reader.
CX, CY: Center position of the ellipse.
R1, R2: The two radii of the ellipse.
Angle: Rotation of the ellipse.
Volume, Pan, Detune: Standard audio parameters for the reader’s output.
Modulation Select/Amount: Assign a modulation source and depth for each parameter.
Filter: Per-reader filter controls.
LFOs: Contains controls for the 4 LFOs.
ADSRs: Contains controls for the 3 ADSR envelopes.
Bottom Bar
Master Volume: Controls the final output gain.
VU Meters: Shows the output level for the left and right channels.

HOME

Image-In.0.2  ( 37 MB )

9 MB

Flechtwerk is a macro synthesizer offering 24 unique synthesis engines, based on Mutable Instruments Plaits and its latest 1.2 firmware. Effortlessly sculpt your sound using three intuitive macro controls—Harmonics, Timbre, and Morph—each spanning a diverse sonic palette.

Shape your dynamics with the integrated low-pass gate (LPG) envelope, featuring decay and color controls for natural, percussive transients or smooth, filtered tails. The LPG can also be disabled for pure, droning textures.

Additional features include a transpose control for shifting the pitch by ±1 octave and two flexible output modes: regular and aux, which can be used independently or mixed for stereo experimentation.

Flechtwerk merges the advanced synthesis capabilities of Plaits with a streamlined, performance-friendly interface—ready for bold, creative sound design across any genre.

Available in VST3 and CLAP format for 64bit Mac/Win/Linux systems.

HOME

Flechtwerk-v2.0.0  (  MB )

422MB

Meet Zykløp, MYTH’s fun, free-spirited little sister. Powered by the same Re-synthesis V2 engine that made MYTH irresistible, Zyklop is ready to take you on a sonic adventure full of fun, exploration, and creativity.

Core Engine & Capabilities
Powered by Re-synthesis V2: Zyklop utilizes the same advanced re-synthesis engine as MYTH, offering unparalleled sound transformation and textural depth.
Single IRIS Oscillator: Create mesmerizing, organic sounds with a streamlined oscillator for efficient and intuitive sound design.
8-Voice Polyphony: Craft lush chords, pads, and leads with eight simultaneous voices.
Semi-Modular Design: Includes flexible sound routing and modulation options in a user-friendly, pedalboard-style interface.
High-Quality Filters & Effects: A versatile suite of filters, resonators, and creative effects enables detailed sound shaping and experimentation.
User-Friendly Interface: Simplified controls ensure accessibility for both beginners and experienced sound designers.
Streamlined Modulation System
Simple yet effective modulation tools to quickly bring your sounds to life.
Lightweight and Efficient
Designed for fast load times and smooth operation, even on modest setups.

Platform Compatibility
Available as VST3 and AU plugins for both Windows and macOS. Completely Free.
macOS 10.13 or Later 64-bit Intel or Apple Silicon AU / VST3
Windows 10, 11 64-bit VST3

HOME

Zyklop_1.03_WIN  ( 422 MB )

Zyklop_1.03_MAC  ( 473 MB )

15 MB

MS-3 is a single oscillator waveshaper synth with filter/envelope controls and built-in effects.

windows and macOS!
VST3 AU

https://www.mensla.com/plugins/ms-3

MS-3  ( 4 MB )

MS-3 Installer  ( 8 MB )

MS-3.component  ( 22 MB )

31 MB

If you’re into retro gaming or just love the quirky, nostalgic sounds of 8-bit music, Relica is the synthesizer plugin you need. It’s simple, powerful, and perfect for anyone who wants to add a vintage vibe to their music without the hassle. Whether you’re making chiptune tracks or just want that old-school sound, Relica makes it easy to bring your music to life.

Super Easy to Use

Relica is designed with simplicity in mind. The interface is clean and intuitive, so whether you’re new to music production or have years of experience, you’ll find it easy to jump right in. No need to spend hours figuring things out—just get started and create!

Create Unique Retro Sounds

What makes Relica stand out is its ability to create rich, authentic 8-bit sounds with a twist. The Pulse Width Modulation (PWM) feature works across all oscillator shapes, not just square waves, letting you tweak and shape your sounds in ways that add depth and variety to your tracks.

Shape Your Sound Your Way

Relica isn’t just about cool sounds; it gives you full control to mold those sounds however you like. Adjust the attack, decay, sustain, and release of your sounds with ease, so you can create anything from sharp, punchy tones to smooth, evolving melodies. Plus, the bitcrusher effect gives your sounds that signature gritty, lo-fi texture, while vibrato lets you add subtle or bold pitch shifts for more expression.

Why Choose Relica?

If you’re looking for a tool that makes creating retro-inspired music fun and easy, Relica is perfect for you. It’s a great choice for both beginners and seasoned producers who want to add a bit of nostalgic magic to their tracks. So why wait? Start making those 8-bit-inspired tunes with Relica today and enjoy the creative journey!

https://www.hivetune.com/shop/relica/

20 MB

SUBSTITUTE MODULAR – SEMI-MODULAR VIRTUAL ANALOG SYNTH
Substitute Modular is a semi-modular virtual analog synthesizer for Windows VST3 (64-bit), inspired by Substitute. It is a redesign with a host of new features, rich modulation options, step sequencers and a massive patchbay.

Features:
Dual oscillator section with classical waveforms
Topology preserving analog-style filters.
Extensive modulation capabilities through four envelopes, four LFOs, two step modulators, two step sequencers and a patchbay.
Creative effect section with delays, chorus, reverb, waveshaper, leveler, tone control, bit reduction and saturation amp.
Midi chord generator and classic arpeggiator.

System Requirements
Microsoft Windows 8.1 or later.
Visual C++ Redistributable Package (2015 version).
A legally acquired host 😉 supporting 64-bit VST3

https://www.flandersh.tech/submod.html

0.8 MB

Virtual analog/FM/digital wave modulation synthesizer with FX.

Highlights
* 2 x oscillators + noise generator
* Waveform’s: Saw and Square wave’s with 0-100% harmonics (modulate sin -> saw/square), Pulse wave with pulse width modulation, PM wave (octave), SAW2 (phase + octave), SRQSAW wave
* OSC’s detune, phase, coarse and mix
* Cross modulation of frequency (OSC1 -> OSC, and OSC2 back to OSC1), with shape/spectrum control of modulator
* Multi-mode 12dB filter with blend option (low-band-high)
* 3 x LFO to pitch, volume, noise, mix, pan, cutoff, q, phase, PM/FM, wave mod1 and mod2. Mod wheel support in LFO1
* 3 x ENV, MOD env to OSC phase, PM, mod1 and mod2
* Velocity to volume, pan, cutoff, q, phase, PM, mod1 and mod2.
* Random (note on) volume, pan, cutoff, q, phase, PM, mod1, mod2, detune and noise
Master section with mono and mono/poly legato
* FX section with chorus, phaser, tempo synced delay, reverb, waveshaper (foldback) and 3 band EQ (lowpass + highpass)
* 64 preset memory with 2 Factory presets banks included

Demo wav

Demo wav

Home

XT-S1  ( 0.8 MB )

60 MB

Firefly Synth is a semi-modular software synthesizer and fx plugin. It’s basically InfernalSynth’s big brother.

Features:

Theming support.
Global unison
Stereo spread + voice detune.
LFO and oscillator phase offset.
LFO and envelope “detuning”.
5 oscillators
Noise generator.
Karplus-strong generator with 2 modes.
Sine + bandlimited saw / triangle / square + pwm.
Bandlimited DSF (Discrete Summation Formulae):

this is basically a limited additive generator, see https://www.verklagekasper.de/synths/dsfsynthesis/dsfsynthesis.html

Hard-sync, unison, AM and FM support.
10 per-voice and 10 global effect modules
Resonant state variable filter with low/high/band/allpass, notch, peaking eq, low/high shelving and bell filters.
Comb filter with feed-forward and feed-back gain.
Distortion module with waveshaper, resonant LPF and before-and-after shape skewing parameters, hard clip and a couple of soft clipping / saturation functions.
(Global only) reverb module, feedback delay and multi-tap delay.

10 per-voice and 10 global LFO’s
Optional bpm-sync and one-shot modes.
Smooth noise, static noise, free-running static noise and various periodic waveforms.
Horizontal and vertical skewing parameters.
Phase adjustment, stair-stepping and smoothing parameter.
10 per-voice DAHDSR envelopes
Linear and 3 exponential modes.
Optional bpm-sync and smoothing parameter.
Attack/decay/release slope control.
Regular legato + retrigger/multitrigger options for monophonic mode.
Master CV module
MIDI/BPM smoothing controls.

5 freely-assignable aux parameters to be used through the mod matrices.
MIDI-linked pitchbend and modwheel (these are bound to external MIDI).
Voice input module
Poly/monophonic mode.
Portamento mode with optional bpm-sync.
Routing matrices
Osc-to-osc amplitude-modulation and frequency-modulation.
Per-voice and global audio routing between osc/voice-mixdown/fx/master-out.
Per-voice and global cv-to-audio matrices (envelopes/lfos/master cv/midi/note events to osc and fx parameters and audio-to-audio matrix parameters).
Per-voice and global cv-to-cv matrices (midi/master cv/envelope/LFO to envelope/LFO and cv-to-audio matrix).
For per-voice modulation, on-note versions of all global CV sources.

https://github.com/sjoerdvankreel/firefly-synth

firefly_synth_1.8.1  ( 60 MB )

Tonetta Blue  is a semi-modular 8-voices polyphonic synthesizer.
The frontside spots two type of oscillators, each with 19 waveforms to choose from, analog style filters, curve and LFO modulation, waveshaper, and a convolution reverb.
Turning the back-button reveal a modular environment with internal and additional signal sources and destinations, signal splitter and mixer, step sequencer, S&H, and additional, modular effects.

• 2 primary sound sources with 19 custom waveforms to choose from.
• 2 analog style filters.
• Curve and LFO modulation.
• Shapeable waveshaper.
• Convolution reverb, waveshaper, modular EQ, and modular delay.

https://flandersh.weebly.com/

Tonetta-Blue  ( 35 MB )