AZR3 is a VST instrument.
It resembles a tonewheel organ including vibrato, distortion effect and a rotating speaker simulation.

It's windows only (for the time being), but you're free to clone this and build your own VSTi.

Oh, yes, most definitely:
I started developing it in 2000 and did the last update in 2005.

This is the first version available as 64 and 32 bit plugin. It's based upon the latest VST SDK with major version 2 (2.4). Though VST SDK 2 is deprecated for years now, most DAWs support this industry standard.

One step after the other.
I'm glad the port from 2.2 to 2.4 did succeed, and I did a lot of refactoring in order to not look completely dinosaur when publishing the code today.

Anyway, I still like the simplicity VST 2 implements. It's not too hard to understand, and it's footprint is smaller. My personal opinion: SDK 2 is a much easier starting point for VST plugin creation, which itself is quite a good kickoff into DSP stuff.

The instrument itself is pretty straight forward, but it comes with some non-obvious features:

• The two upper registers respond to midi channel 1 and 2, the pedal section to channel 3. That's hard-coded.
• A switchable option enables speed selection for the rotating speaker simulation by using the sustain pedal.
• The plugin offers two audio inputs which are routed into the effects section. You could use the AZR3 effects on other instruments if you get your DAW to perform the correct routing (and probably disable midi input).

I used "Microsoft Visual Studio Community 2019.

• The project expects the VST SDK 2.4 to exist at ..\vstsdk. If you obtained a license from Steinberg when it was still available you can even use it legally, otherwise you will have to fetch the sdk from somewhere else and break the Steinberg license rules.
  Yes, I got a license some 20 years ago (some years after the rectification of the vuldronaii, but that's a different story).

• The current configuration creates a statically linked DLL.
  This means you need a local installation of the "C++-MFC" matching your current toolchain version. It's available via the Visual Studio Installer.

• SDK 3
  No way without severe reconstruction.
• SDK 2 < 2.4 Would need refactoring: With 2.4 Steinberg changed the signatures of some of the functions called by the host. This is not detected automatically; The project would probably build without exploding, but some of the functions would not be called by the host.

No specific one, just these rules:

• Ask me if you plan to sell it.
• Please consider a donation as mentioned within the running plugin.