Spectralhead Audio updates SilverBox to v1.1.2 newsinstrument plugins Jan 14, 2008 0 Spectralhead Audio has released version 1.1.2 of SilverBox, the virtual bass line VST instrument for Windows PC. Changes since v1.1 Added darker stripes to piano roll for black keys. Piano roll works by both clicking and dragging. Only active steps are displayed in the piano roll. Slight GUI changes. Visit Spectralhead Audio for more information, audio examples and a link to download a demo of SilverBox.