The Kitchen Sync is a really good TBC for the Video Toaster as are all the Leitech DPS ones. The Toaster is really fussy about the video it can sync to. The TBC was necessary with VCRs because of tape instability. Older analog NTSC cameras, laser disc and DVD players are fine without one. Newer video equipment uses newer digital HD video standards that are converted to analog and scaled to ntsc composite at the composite output and I've had to use a TBC with just about everything that has a HDMI or DVI output due to the varying quality of the analog video out from them.
TBCs actually convert the analog to digital internally order to process it and it is converted to analog again at the output and they can do all kinds of processing of the video signal in addition to stablilizing and syncronizing it. The most useful one is they can freeze video much better than the toaster which makes taking framestores a lot easier. A lot of them use 4:2:2 video compression internally which is still used today in satellite broadcasting to conserve bandwidth. They are very advanced devices for the times they were made in.
I use a Kitchen Sync with my Toaster 4000. A few years ago, I had a Toaster 2000 with a DPS TBC III. Both have their strong points. It took me a while to get both channels working again on my Kitchen Sync but now that it is fully working, I love it.
