I'm considering renting a Roland V-1600 HD mixer for an event. I want to make a vintage filter ontop of a live broadcast (comming in over HDMI). 1. Would a filter with a color gradient even work to compose with the live broadcast using chroma/luma key in the mixer? (I never tired) 2. Has anyone used the option with a still image layer in DSK-mode? Will the V-1600 honor the alpha channel in a BMP-file? That could be an easy solution to making that filter.