let n0 = live.biosignal { stream: "synthetic" };
let n1 = dsp.fft(signal: n0.signal) { size: 512 };
let n2 = Max(input: n1.magnitude.clone());
let n3 = FloatLiteral { value: 0.5 };
let n4 = GreaterThan(a: n2.result, b: n3.value);