Track one has the audio source (replace the Flexi Sampler by the track audio input if you want to use Drambo as an effects unit).
The sequencer is used to specify when your input signal is routed to one of the 4 FX units (or just use no effect at all when that sequencer step is set to zero).
The sequencer has 16 steps and it will run in sync with your AUv3 host.
Tracks 2..5 have different effects, feel free to add anything you like there. Make sure that after adding new modules, the last module’s output is connected to the track output.

Remember that can tap on the named pads to quickly jump to any track.