General
If you couldn't possibly choose between analogue or digital tremolo then just do both! The Old Blood Noise Endeavors Whitecap spits both modulation flavours at the same time. Stack both effects in series or place them end-to-end in parallel to change things up before setting the Rate, Depth and Volume per effect. Over on the analogue side, you're given access to some classic, moderate to lightning-fast rhythmic ring-modulation-style sounds while, over on the digital side, you can select one of five different waveforms before setting the speed via the time-tempo switch. Hook up an external expression pedal and tweak the speed in real-time to conjure a sweet swell-style effect.