VIER modernizes with features expected with today's virtual synths like parameter linking, cross modulation and intelligent voice management for assigning notes of chord (for example) to four different modules for unlimited polyphony. When played, the keyboard keys in the GUI also light up to match the particular voice(s) color used at any moment! This is a great feature when programming special effect patches.

I liked the variety of factory presets I used as starting settings--these may be loaded, adjusted, saved, or marked as a favorite. You can create, save and load your own presets--very handy with all the great sounds you can get so easily with VIER!

VIER runs stand-alone on Windows and Mac OS X or as plug-in virtual instrument in VST, AU, RTAS and AAX hosts where I've been playing it within Pro Tools 11 HD. VIER responds naturally to keyboard input and parameter changes just as a good hardware synthesizers should--except it is on my computer screen!