The document discusses several add-on effect packages that can upgrade Yamaha digital mixing consoles to VCM series capability. The packages include channel strip and master strip effects that employ VCM technology to recreate the sound of classic compression and EQ units from the 1970s. They also include reverb effects using REV-X algorithms and a surround post package using iSSP technology. Owners of certain Yamaha consoles can add these effects packages through a USB upgrade process.