TRAX and TRAX Pro are standalone Mac-only applications designed to completely separate melodic content from a mix. VVC and SVC are cross-platform plug-ins that only work within a DAW. Although they can be used for volume adjustments of +/-12dB, neither VVC nor SVC will yield full isolations. VVC offers an easy way to manipulate relative level and pan-position of a vocal or instrument melody within a mix. SVC offers independent volume control over speech and background elements within a mix.