Function testAboveThresholdPassthrough

tests/client_gate_test.cpp:116–144

Signal well above threshold → unity gain (no attenuation).

// Signal well above threshold → unity gain (no attenuation).
void testAboveThresholdPassthrough()
{
    ClientGate gate;
    gate.prepare(kSampleRate);
    gate.setEnabled(true);
    gate.setThresholdDb(-40.0f);
    gate.setRatio(10.0f);
    gate.setAttackMs(0.5f);
    gate.setReleaseMs(50.0f);
    gate.setHoldMs(0.0f);
    gate.setFloorDb(-40.0f);

    // Prime envelope with a long burst at -6 dBFS.
    const float ampIn = dbToLin(-6.0f);
    auto buf = makeTone(1000.0, 4800, ampIn);  // 200 ms
    processBlocks(gate, buf.data(), 4800);

    // Now measure the trailing block — envelope is fully settled.
    const int tailFrames = 512;
    auto tail = makeTone(1000.0, tailFrames, ampIn);
    processBlocks(gate, tail.data(), tailFrames);

    const float outPeak = peakAbsStereo(tail.data(), tailFrames);
    const float grDb = linToDb(outPeak / ampIn);

    report("above-threshold: unity gain (no reduction)",
           std::fabs(grDb) < 0.5f,
           "GR=" + std::to_string(grDb) + " dB");
}

// Signal below threshold, soft expander (ratio 2:1, floor -15 dB):
// expected reduction = min(floor, (T - env) * (ratio - 1))