dplug 2.0.28

D audio toolkit. Easy way to make VST plugins.

To use this package, run the following command in your project's root directory:

Manual usage
Put the following dependency into your project's dependences section:

dplug Build Status

<img alt="logo" src="https://cdn.rawgit.com/p0nce/dplug/master/logo.svg" width="200">

dplug is a library for creating audio plugins. Additionally it comes with music DSP algorithms that might be useful for your next-generation MS converter plugin. Currently support VST 2.x plugins on Windows and Mac OS X, 32-bit and 64-bit.

Example screenshot





  • Abstract plugin client interface. Currently implemented once for VST.


  • Abstract plugin host interface. Currently implemented once for VST.


  • VST SDK D bindings
  • VST plugin client


  • implements windowing for Win32, Cocoa and Carbon


  • Needed for plugins that do have an UI
  • Toolkit includes common widgets (knob/slider/switch/logo/label)
  • PBR-based renderer for a fully procedural UI (updates are lazy and parallel)


  • Basic support for audio processing:
    • FFT and windowing functions (include STFT with tunable overlap and zero-phase windowing)
    • FIR and RJB biquads (no higher order IIR sorry)
    • mipmapped wavetables for antialiased oscillators
    • noise generation including white/pink/demo noise
    • various kinds of smoothers and envelopes
    • delay-line and interpolation


  • examples/distort: mandatory distortion plugin
  • examples/time_stretch: resampling x2 through FFT zero-padding
  • examples/just_windowing: test program for the windowing sub-package


  • tools/pbr-sketch: workspace for creating plugin background textures
  • tools/release: DUB frontend to build Mac bundles and use LDC with proper envvars
  • tools/ldvst: small plugin host for testing loading, in D
  • tools/process: test plugin host for testing audio processing speed/reproducibility, in D
  • tools/ldvst-cpp: test plugin host for testing loading, in C++
  • tools/wav-compare: comparison of WAV files

How to build plugins

  • Use the DMD >= 2.067 compiler on Windows and/or the LDC >= 0.16.0 compiler for Mac 64-bit: http://dlang.org/download.html
  • Install DUB, the D package manager: http://code.dlang.org/download
  • Compiling for Mac or with LDC? Use my DUB branch instead: https://github.com/p0nce/dub/tree/issue-635-bis
  • go in the examples/distort directory
  • type dub --compiler=dmd or dub --compiler=ldc2 depending on the platform


dplug has three different licenses depending on the part you need. For an audio plugin, you would typically need all three. I recommend that you check individual source files for license information.

Plugin format wrapping

Plugin wrapping is heavily inspired by the WDL library (best represented here: https://github.com/olilarkin/wdl-ol).

Some files falls under the Cockos WDL license.

Important contributors to WDL include:

  • Cockos: http://www.cockos.com/
  • Oliver Larkin: http://www.olilarkin.co.uk/

However dplug is far from a translation of WDL:


  • no plugin-wide mutex lock. All locks are of a short duration.
  • plugin parameters implement the Observer pattern
  • no need to use Xcode whatsoever
  • float parameters can have user-defined mapping
  • PBR-style rendering lets you have a good visual quality with less disk space, at the cost of more work
  • no need to deal with resource compilers: D can import("filename.ext") them.


  • less battle-tested in general
  • hipster compilers are used
  • API may change without notice (pin the version of dplug you use)
  • AU, AAX and VST3 unimplemented
  • no resizeable UI
  • no HDPI support

VST SDK translation

This sub-package falls under the Steinberg VST license.

VST is a trademark of Steinberg Media Technologies GmbH. Please register the SDK via the 3rd party developper license on Steinberg site.

Before you make VST plugins with dplug, you need to read and agree with the license for the VST3 SDK by Steinberg. If you don't agree with the license, don't make plugins with dplug. Find the VST3 SDK there: http://www.steinberg.net/en/company/developers.html


Other source files fall under the Boost 1.0 license.


  • What is the minimum Windows version supported?

Windows XP+

  • What is the minimum OSX version supported?

Mac OS X 10.7+ Probably possible to go below, to do that modify the "release" tool.

  • What D compiler should I use?

  • DMD >= 2.067

  • LDC >= 0.16.0

  • Is dplug stable?

No. The interface tend to change especially in dplug:dsp. Pin the version you use using DUB version specifications.


Release notes

  • v2.x.y:
  • this is the next release, and API will break without notice
  • supports VST for 32-bit and 64-bit, Windows and Mac
  • release tool now expects a VST or AU configuration, see the distort example for details
  • special dub.json key CFBundleIdentifier became CFBundleIdentifierPrefix, see how distort works to update your plugins dub.json
  • 10.6 compatibility dropped.
  • v1.x.y:
  • initial release, VST support for 32-bit and 64-bit, Windows and Mac
  • Guillaume Piolat
  • Andrej Mitrovic
  • Sean M. Costello (Hilbert transformer)
Sub packages:
dplug:core, dplug:dsp, dplug:client, dplug:host, dplug:vst, dplug:au, dplug:window, dplug:gui
14.3.4 2024-May-26
14.3.3 2024-May-05
14.3.2 2024-May-05
14.3.1 2024-Mar-17
14.3.0 2024-Feb-05
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