Virtual Studio Technology (VST) is a software interface that integrates software audio synthesizer and effect plugins with audio editors and recording systems. VSTand similar technologies use digital signal processing to simulate traditional recording studio hardware in software.
VST plugins generally run within a digital audio workstation (DAW), to provide additional functionality, though a few standalone plugin hosts exist which support VST. Most VST plugins are either instruments (VSTi) or effects, although other categories exist—for example spectrum analyzers and various meters. VST plugins usually provide a custom graphical user interface that displays controls similar to physical switches and knobs on audio hardware. Some (often older) plugins rely on the host application for their user interface.
VST instruments include software simulation emulations of well-known hardware synthesizers and samplers. These typically emulate the look of the original equipment as well as its sonic characteristics. This lets musicians and recording engineers use virtual versions of devices that otherwise might be difficult and expensive to obtain. Also, many VST plug-ins come with preset sounds, which gives a user a starting point to become creative. There are communities online which share VST presets, such as KVR Audio 
VST instruments receive notes as digital information via MIDI, and output digital audio. Effect plugins receive digital audio and process it through to their outputs. (Some effect plugins also accept MIDI input—for example MIDI sync to modulate the effect in sync with the tempo). MIDI messages can control both instrument and effect plugin parameters. Most host applications can route the audio output from one VST to the audio input of another VST (chaining). For example, output of a VST synthesizer can be sent through a VST reverbeffect.
In this section there is a range of FREE VST PLUGINS available for you to download and use. The page is updated monthly with more added. The collection on this page is forever growing
Classic Compressor is a classic analogue style compressor with lots of warmth and punch. Specially designed to be used on individual instruments and vocals, but also very useable on final mixes.
DSP-1 can be used as an insert effect on single drum channels (bass drum, snare drum, overheads, etc.) or to process the entire drum bus. The aim of this effect is to increase the perceived level of the processed audio without introduce too much color or artifacts and, above all, avoiding distortion. With DSP-1 it's very easy to maximize the audio level of your drum track without make it sound over compressed or distorted..
is a versatile compressor with countless ways to shape the incoming audio.Unlike many other digital compressors, it has 'soul'. It likes to bite, but it can be tamed easily once you've learned how to use its potential.