VST is an acronym for Virtual Studio Technology. It is an interface for integration of virtual effect processors and instruments into the digital audio environment.

VST plugins are the special software modules for use within VST host applications. A VST host is usually an audio production application that allows VST plugins to be used in a logical context, interacting with digital audio and MIDI elements.

The VST plugin standard was developed by Steinberg and first realized in 1996 in its famous Cubase software. Because VST is a popular and open standard, many other companies also create their own VST host application. Some of the most popular are listed in the table below.

WIDI Audio To MIDI VST plugin is music recognition software that works within a VST host. In order to use it you need to have a VST host application installed.

Some audio production applications accept only Direct X plugins. See using WIDI VST as a Direct X Plugin for additional information