SuperCollider audio-analysis UGens are not wired to this rig's AV bridge and cannot drive its visuals

SuperCollider has rich audio analysis capabilities including FFT, Amplitude, Onsets, Pitch, and SendReply/SendTrig, but none of these are connected to the livecoding rig’s AV bridge, which exposes exactly 4 Strudel FFT bins to Hydra. SC is audio-only and source-only in this rig — it is not wired as a rig engine. Authoring SC-to-visual reactivity as if it feeds the rig is incorrect; the AV bridge is driven exclusively by Strudel. This is a rig-fork constraint, not a fundamental SC limitation.

Examples

// Wrong: Amplitude.kr(sig) does not reach Hydra in this rig // Correct: AV reactivity flows from Strudel FFT bins only (see av-bridge.md)

Assessment

A learner asks how to drive Hydra visuals from a SuperCollider amplitude envelope. What is the correct answer for this rig, and why?