ModularGrid Rack

Hello, So I'm suuuuper new to this. But I'm interested in eventually, ultimately creating an all-in-one audio/video performance rack (maybe years before that'd happen..) Really interested in these Video Waveform Generators, but also looking to connect whatever visual outputs I have to the audio output, and potentially even vice versa. Really what I'm looking for is a simple drum/synth/effect set up at the bottom and video at the top. But I really have no idea what would work well together, if at all. What should be essential for the Audio portion here? Any suggestions on mixed audio/video components? Pardon if this all looks like nonsense..