Every wave mode is simultaneously an oscillator depending on viewpoint

Evidence

Resonance and driving a single-bead oscillator can be viewed as resonance of a “wave” on a “string” having only one mode. Each mode of a string of beads is both a wave capable of constructive and destructive interference and an oscillator, depending on how you choose to look at it. — Eric J. Heller, Why You Hear What You Hear- An…, 1011

Categorization

• DEEPTHINKING: A genuinely unifying insight: wave-resonance and driven-oscillator resonance are the same phenomenon seen two ways — this dissolves an apparent dichotomy at the heart of hearing/playing music.