k-synth ~ Pocket Calculator Synthesizer


/synth is a minimalist, array-oriented synthesis environment. Heavily inspired by the K/Simple lineage and the work of Arthur Whitney, it treats sound not as a stream, but as a holistic mathematical vector.

📐 The Philosophy

This isn’t a DAW; it’s a vector-processing engine designed for “Base Camp” signal processing.

It uses:

  • One-Letter Variables: A-Z globals only.
  • Right-Associativity: Expressions evaluate from right to left.
  • Vectorized Verbs: Math applied to entire buffers at once.

Sound is a vector. A kick drum is a vector. A two-second bell tone is a vector. You do math on vectors and the result is audio. There are no tracks, no timelines, no patch cables — only expressions.

octetta.github.io/k-synth
github.com/octetta/k-synth

AJED ~ Roland JUNO ALPHA & MKS50 Editor


An Editor for Roland JUNO ALPHA 1 / 2 HS-10 / HS-80 and Roland MKS50

sourceforge.net/projects/ajed

Sampletoy ~ Sampler & Synthesiser


Sampletoy is a radical new musical instrument / plaything;
part sampler, part granular synthesiser.

Use it to capture sounds through the microphone,
then playlooppitch and distort them live on the screen.

www.elf-audio.com/sampletoy
www.facebook.com/elfaudioapps

SY-FloorBoard ~ BOSS & Roland Editors


A collection of graphical midi based editors, each made specifically for the BOSS SY-1000 , Roland VG-99 guitar, or VB-99 bass synth units, which provide an alternative to the Boss or Roland version of midi editors, with full features and control of the SY-1000, VG-99, or VB-99 from a Windows, Mac, or Linux computer.

Features:

  • Midi editing of parameters on-line or off-line, text list generation of settings, file load/save/backup/restore, ease of use with graphical interface.
  • A different version specific for each device.
  • SY-1000FloorBoard version also has features to convert patches from VG-99,VB-99, GP-10, GT-1000 units.
SY-1000 Floorboard interface

sourceforge.net/projects/sy1000floorboard

JD990 Super Editor ~ Roland JD-990 Editor


CtrlrX based editor for Roland SUPER JD SYNTHESIZER MODULE JD-990

Features:

  • Menu access to SR-JV80/SL-JD80 external card patches and waveforms if installed.
  • Rename any remote patch name for Internal Patches I-11 – I-88 (64 x patches).
  • Save Temporary Patch data on Ctrlr panel to any Internal Patch location I-11 – I-88 (64 x patches).
  • Palette mode. Quick adjustment of each Tone ABCD using mouse wheel or click & drag.
  • Patch data on panel can be saved as a sysex file to computer.
  • Bulk Sysex dumps of patches I-11 – I-88
  • Emulation of most graphic elements on the JD-990 display.
  • Separate ”mixer’ area allowing simultaneous adjustment of each Tone Level & Pan.
  • Sync button~ synchronising panel with JD-990.
  • PATCH mode, PERFORMANCE and RHYTHM editing
  • Map Keyboard Control CC messages to panel.
  • MIDI learn feature
  • Support for SO-PCM1 cards not yet fully implemented
JD990 Super Editor

sourceforge.net/projects/jd990-super-editor
github.com/RomanKubiak/ctrlr

anklang ~ MIDI & Audio Synthesizer & Composer


Anklang is a digital audio synthesis application for live creation and composition of music and other audio material.

anklang.testbit.eu
tim-janik.github.io/anklang
github.com/tim-janik/anklang

SF2Lib ~ SoundFont (SF2) Synthesizer In C++


This library can read SF2 SoundFont files and render audio samples from them in real-time. It properly reads in a compliant SF2 file and can be used to obtain meta data such as preset names. It also has an audio rendering engine that can generate audio samples for key events that come from (say) a MIDI keyboard. This library is currently being used by my SoundFonts and SoundFontsPlus applications for SF2 file parsing and, in the latter app, as the sample generating engine.

Although most of the library code is generic C++17/23, there are a few bits that expect an Apple platform that has the AudioToolbox and Accelerate frameworks available. The goal is to be a simple library for reading SF2 files as well as a competent SF2 audio renderer whose output can be fed to any sort of audio processing chain, but it would probably take some effort to remove it from the Apple ecosystem.

github.com/bradhowes/SF2Lib
swiftpackageindex.com/bradhowes/SF2Lib

StrumPract ~ Various Tools For Musicians


  • Learn to play drums set in 4 lessons and develop your art.
  • Practice your other instruments with a editable drums machine.
  • Tune your guitar and bass.
  • Play audio files and loop it, adjusting the tempo of the song to what you want.
  • DJ console for auto-mixing, with 2 players and direct-output of mic.
  • Record your ideas-jam.
  • Chords randomizer for jamming.
  • Image Dancer.
  • Tag info with images.
  • Many Layout and Styles.

Features:

  • DJ console
  • Recording
  • Drums set
  • Piano synth
  • Noise producer
  • Image dancer
  • Jam session
  • Chords randomizer

sourceforge.net/projects/strumpract
github.com/fredvs/strumpract
forum.lazarus.freepascal.org/index.php?topic=52237.0

Cardinal ~ Virtual Modular Synthesizer Plugin


A fully free and self-contained modular synthesizer based on the popular VCV Rack. Available in AudioUnit/CLAP/LV2/VST2/VST3 plugin formats and as a standalone app for FreeBSD, Linux, macOS, Windows and the Web.

cardinal.kx.studio
github.com/DISTRHO/Cardinal

rt_pvc ~ Realtime Phase Vocoder


rt_pvc is a:

  • real-time phase vocoder library for synthesis/analysis
  • vocoder application that allows the user to do time-expansion, frequency expansion, and cross-synthesis in real-time, from mic-input or from file.
  • real-time phase vocoder visualization
  • learning tool that teaches about the phase vocoder and its implementation
  • open source!

soundlab.cs.princeton.edu/software/rt_pvc
aur.archlinux.org/packages/rt_pvc

Binary Synth ~ Audio Synthesis From Binary


A web-synthesizer that generates sound from the binary code of any files. It can synthesize sound directly in the browser, or be a generator of MIDI messages to external devices or DAWs, turning any file into a score. All the application code is written in Javascript and along with everything you need is packed into a single .html file of about 750kb. The synthesizer doesn’t need internet, it can be downloaded and run locally on any device with a browser.

The application reads the file sequentially, and due to the high speed of reading and random deviation of reading duration, we can get quite unpredictable generation of timbre nuances, and at certain settings we can switch to granular synthesis.

github.com/MaxAlyokhin/binary-synth
bs.stranno.su

ML_SynthTools ~ Arduino Synthesizer Library


This library is made to be used for synthesizer projects. It contains modules to create sound, to drive an audio codec and create some audio effects.

This library supports different platforms:

  • ESP32, ESP32S2, ESP32S3
  • ESP8266
  • Seeedstudio XIAO (samd21 – cortex-m0plus)
  • Teensy 4.1 (imxrt1062)
  • Daisy Seed (cortex-m7)
  • Raspberry Pi Pico (rp2040)
  • STM32F407 (cortex-m4)
github.com/marcel-licence/ML_SynthTools