VSTHost is a demonstrational Windows program written in order to comprehend the inner workings of VST plugins. VSTHost is capable of:

• loading VST effects (aka "plugins")
• parameterizing / editing them
• sound output for VSTis
• MIDI-input and -output
• loading / saving .fxb files

The important part of the program is an implementation of a VST host in form of 2 classes:

CVSTHost

This implements the audio callback needed by an effect plugin as a neatly encapsulated VST host class. This is practically platform-independent code. The few platform-specific things are encapsulated in...

Ceffect

This encapsulates a VST effect, as loaded by the VST host. This class isn't fully complete - since I don't have a Mac, I've only included the Windows code.

New in v1.46

• Can play .mp3 files (using external mpg123 package - see VSTHost documentation for details).
• Lots of bug fixes and internal changes as usual. Since it's been nearly two years since the last official update, there are many.
• Experimental VST3 support.
• Experimental VST Module Architecture support.
• MIDI filtering and transformations have been expanded and made much more flexible.
• Speaker configuration can be done for plug-ins that support it.
• Audio in / out is done through special pseudo-plug-ins now; this permits to remove the distinction between "insert" and "send" links between plug-ins.