Beat detection algorithm
| 121 | |
| 122 | // Beat detection algorithm |
| 123 | bool detectBeat(float energy) { |
| 124 | beatHistory[beatHistoryIndex] = energy; |
| 125 | beatHistoryIndex = (beatHistoryIndex + 1) % 20; |
| 126 | |
| 127 | // Calculate average |
| 128 | beatAverage = 0; |
| 129 | for (int i = 0; i < 20; i++) { |
| 130 | beatAverage += beatHistory[i]; |
| 131 | } |
| 132 | beatAverage /= 20.0f; |
| 133 | |
| 134 | // Calculate variance |
| 135 | beatVariance = 0; |
| 136 | for (int i = 0; i < 20; i++) { |
| 137 | float diff = beatHistory[i] - beatAverage; |
| 138 | beatVariance += diff * diff; |
| 139 | } |
| 140 | beatVariance /= 20.0f; |
| 141 | |
| 142 | // Detect beat |
| 143 | float threshold = beatAverage + (beatSensitivity.value() * fl::sqrt(beatVariance)); |
| 144 | uint32_t currentTime = millis(); |
| 145 | |
| 146 | if (energy > threshold && (currentTime - lastBeatTime) > 80) { |
| 147 | lastBeatTime = currentTime; |
| 148 | return true; |
| 149 | } |
| 150 | return false; |
| 151 | } |
| 152 | |
| 153 | // Update auto gain |
| 154 | void updateAutoGain(float level) { |