# SM-26

A simple subtractive synthesizer plugin built with JUCE / C++.

* **VST3** + **Audio Unit** (macOS arm64), **VST3** (Linux)
* 4 rotary knobs on the front panel whose meaning follows the selected preset
* 52 factory presets (Bass / Lead / Pad / Keys / Pluck / FX / Stab / Arp)
* tempo-synced delay (follows the host transport / BPM)
* 4x80 HD44780-style pixel display with a cascaded on-screen menu
* left/right/up/down navigation diamond + ENTER / ESC controls the menu
* status footer with the git revision and local build time

## Build

Requires a C++17 compiler, CMake >= 3.22 and (on Linux) X11/ALSA dev headers.

```sh
make            # clones JUCE (once) into deps/ and builds
make install    # installs + ad-hoc signs + un-quarantines
make uninstall  # removes the installed plugins
make distclean  # wipes build/
```

* macOS installs to `~/Library/Audio/Plug-Ins/` (AU + VST3).
* Linux installs to `~/.vst3/`.

If a freshly installed AU is not visible to `auval` / your DAW:

```sh
sudo killall -HUP coreaudiod
```

## Usage

* Ship MIDI into the plugin; the 4 front-panel knobs drive whichever
  parameters the current preset maps them to (e.g. cutoff/resonance/
  envelope/delay, but many other routings exist).
* **Nav diamond + ENTER/ESC** drive the on-screen menu:
  * root menu -> PRESETS / OSCILLATORS / FILTER / ENVELOPE / DELAY / SYSTEM
  * up/down = move, left/right = adjust value, ENTER = open/confirm, ESC = back
* The LCD shows the current preset, the four knob mappings with live values,
  host BPM and voice count. The delay can be set to a rhythmic subdivision
  (SYNC) and locks to the host tempo.

## Layout

```
Build: Makefile -> CMake -> JUCE (deps/juce)
Source/
  PluginProcessor.*   audio processor + DSP shell
  SynthEngine.*       osc/filter/ADSR/delay voice engine
  Presets.*           52 preset definitions + knob routings
  SynthParams.*       parameter model + formatting
  PluginEditor.*      panel, knobs, nav diamond, footer
  LcdDisplay.*        4x80 HD44780-style display renderer
  MenuSystem.*        cascaded menu state machine
tools/gen_buildinfo.sh  generates git-version + build-time header
```