When tracks are mixed together into the master output or when chains are mixed together to form the rack output, they can be mixed in several ways. Which way is chosen depends on the Blend mode setting in the Properties.
There are several other factors to take into account:
- Tracks are blended in left-to-right order, so the left-most track is overlaid with the track on its right side using the overlaying track’s blend mode. The result is overlaid with the following track, and so on.
- For some blend modes, like the default Additive blending, the order doesn’t matter, since all values are added. But for others, like Subtract, the results can look very different depending on the order of the track in your set.
- Group tracks work as expected. First the tracks within the group are blended, then the output of the group track will be blended with other tracks that are on the same level.
- In rack chains, the blend order is from top to bottom. Apart from that blending behaves exactly like on tracks.
Blending in racks works exactly like it works with tracks. The result of a rack chain is mixed with the other chains in the rack to for the final rack output.
Videosync currently supports the following main blend modes:
- Additive: The default blend mode. Simply adds all colors of the underlying and overlaying images.
- Alpha: Draws the overlaying image over the underlying image, unless the overlaying image has transparency, for instance when a track is playing a video that has an alpha channel. The alpha channel determines what part of the underlying image is seen through the overlaying one.
- Mask: The underlying image is seen only where the overlaying track is not black.
- Mask alpha: The same as Mask except that the underlying image is seen where the overlaying image is transparent, like with the Alpha blend mode.
Apart from that, Videosync contains the following artistic blend modes, recognizable from your favorite photo editing tool:
- Color dodge
- Color burn
- Linear burn
- Linear dodge
- Soft light
- Hard light
- Vivid light
- Linear light
- Pin light
- Hard mix