Function loop

examples/Audio/advanced/advanced.h:501–638

}

void loop() {
    // Check if audio is enabled
    if (!enableAudio) {
        // Show a simple test pattern
        fill_rainbow(leds, NUM_LEDS, hue++, 7);
        FastLED.show();
        delay(20);
        return;
    }
    
    // Process only one audio sample per frame to avoid accumulation
    fl::audio::Sample sample = audio.next();
    if (sample.isValid()) {
        // Process pitch detection if enabled
        if (pitchDetectEnable && pitchEngine) {
            // Convert int16_t samples to float for pitch detection
            static float floatBuffer[FFT_SIZE];
            size_t numSamples = fl::min(sample.pcm().size(), (size_t)FFT_SIZE);
            for (size_t i = 0; i < numSamples; i++) {
                floatBuffer[i] = sample.pcm()[i] / 32768.0f;
            }
            pitchEngine->processFrame(floatBuffer, numSamples);
        }

        // Update sound meter
        soundMeter.processBlock(sample.pcm());
        
        // Get audio levels
        float rms = sample.rms() / 32768.0f;
        
        // Calculate peak
        int32_t maxSample = 0;
        for (size_t i = 0; i < sample.pcm().size(); i++) {
            int32_t absSample = fl::fabsf(sample.pcm()[i]);
            if (absSample > maxSample) {
                maxSample = absSample;
            }
        }
        float peak = float(maxSample) / 32768.0f;
        peakLevel = peakLevel * 0.9f + peak * 0.1f;  // Smooth peak
        
        // Update auto gain
        updateAutoGain(rms);
        
        // Beat detection
        if (beatDetect) {
            isBeat = detectBeat(peak);
        }
        
        // Get FFT data - create local Bins to avoid accumulation
        fl::audio::fft::Bins fftBins(NUM_BANDS);
        sample.fft(&fftBins);
        
        // Update color animation
        hue += 1;
        
        // Apply beat flash
        if (isBeat && beatFlash) {