Radar
The RADAR block — the visual sibling of an instrument. Wire any sound into it and watch its SHAPE as a glowing phase-portrait on a radar field (a van der Pol (x, x-delayed) portrait with phosphor persistence: an oscillator draws a limit-cycle loop, noise a fuzzy cloud). A pure-RENDER block (the analysis species): it TAPS the signal and shows it, passing the audio through unchanged so you can also chain it onward. The block's face IS the scope — nothing to dial, everything to see.