VST2/3 A/B Switch

This project is a VST implementation of the A/B Audio Switch rack extension. You can check the A/B Switch documentation directly.

This project is connected to the VST Development Notes blog post series.

2021-01-04 - Status for tag v1.1.3

• Use of jamba framework and VST SDK 3.7.0
• Use of ParamImageView for LED status lights
• Added support for Audio Unit
• Added support for Apple Chipset / universal build on macOS

2018-06-19 - Status for tag v1.1.2

• fixed memory allocation in the real time processing issue

2018-06-12 - Status for tag v1.1.1

• fixed soften status not being saved

2018-04-18 - Status for tag v1.1.0

• Now builds on Windows as well

2018-04-14 - Status for tag v1.0.0

• the logic is fully implemented: switching between A & B, optional cross fading (soften feature), ability to name each input, LED audio on status light
• the UI is now similar to the rack extension UI
• see A/B Switch documentation

2018-03-24 - Status for tag blog-part4-369

• the logic is fully implemented: switching between A & B, optional cross fading (soften feature), ability to name each input, LED audio on status light
• no "pretty" UI
• see VST Development Notes (3.6.9) - Part 4 for details

2018-03-17 - Status for tag blog-part3-369

• the plugin has a small UI with text and a switch to toggle between input A and B
• the basic logic is working => toggling between A and B actually toggles which input is copied to the output
• see VST Development Notes (3.6.9) - Part 3 for details

2018-03-13 - Status for tag blog-part2-369

• the plugin uses SDK 3.6.9
• the plugin compiles while depending on the SDK (following this other project vst3-again-sample)
• the processing part is doing exactly what the vst24-hello-world plugin is doing: simply removing 3dB by multiplying every sample by 0.5 (as a way to check that the processing part is being executed properly)
• the controller part (UI) is a black square and by right clicking in it you can enter the inline UI editor that comes built-in with VSTGUI 4! (if compiled in Debug mode).
• see VST Development Notes (3.6.9) - Part 2 for details

Configuration and requirements

Check the Jamba README file for instructions on how to install and configure the VST3 SDK.

Build this project

The following steps describes how to build the plugin:

1. Invoke the configure.py python script to configure the project
2. Run the jamba.sh (resp. jamba.bat) command line to build, test validate...

macOS

For simplicity I am creating the build at the root of the source tree, but can obviously be outside the source tree entirely by running the script from anywhere

> ./configure.py -h # to see the help
> ./configure.py
> cd build
> ./jamba.sh -h

Windows

For simplicity I am creating the build at the root of the source tree, but can obviously be outside the source tree entirely by running the script from anywhere. Note that PowerShell is highly recommended.

> python configure.py -h # to see the help
> python configure.py
> cd build
> .\jamba.bat -h

Parameters

These are the parameters used by this plugin:

| ID   | TITLE        | TYP | OW | TRS | SHA | DEF.N | DEF.S         | STP | FLG | SHORT  | PRE | UID | UNS |
-------------------------------------------------------------------------------------------------------------
| 1000 | Audio Switch | vst | rt |     |     | 0.000 | A             | 1   | 1   | Switch | 4   | 0   |     |
-------------------------------------------------------------------------------------------------------------
| 1010 | Soften       | vst | rt |     |     | 1.000 | On            | 1   | 1   | Soft   | 4   | 0   |     |
-------------------------------------------------------------------------------------------------------------
| 1020 | Audio On     | vst | rt | x   |     | 0.000 | Off           | 1   | 2   |        | 4   | 0   |     |
-------------------------------------------------------------------------------------------------------------
| 500  | Label A      | jmb | ui |     |     |       | Input Label A |     |     |        |     |     |     |
-------------------------------------------------------------------------------------------------------------
| 501  | Label B      | jmb | ui |     |     |       | Input Label B |     |     |        |     |     |     |
-------------------------------------------------------------------------------------------------------------

Misc

This project uses loguru for logging.

Licensing

GPL version 3