Electronic music often uses dynamic and synchronized digital audio effects that cannot easily be recreated in live performances. Cross-adaptive effects provide a simple solution to such problems since they can use multiple feature inputs to control dynamic variables in real time. We propose a generic scheme for cross-adaptive effects where onset detection on a drum track dynamically triggers effects on other tracks. This allows a percussionist to orchestrate effects across multiple instruments during performance. We describe the general structure that includes an onset detection and feature extraction algorithm, envelope and LFO synchronization, and an interface that enables the user to associate different effects to be triggered depending on the cue from the percussionist. Subjective evaluation is performed based on use in live performance. Implications on music composition and performance are also discussed. Keywords: Cross-adaptive digital audio effects, live processing, real-time control, Csound.