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Avoid NANs when no blocks have been processed #43

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Avoid NANs when no blocks have been processed #43

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2 changes: 1 addition & 1 deletion analyze_rms_f32.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -64,5 +64,5 @@ float AudioAnalyzeRMS_F32::read(void) {
float32_t num = (float32_t)count;
count = 0;
__enable_irq();
return sqrtf(sum / (num * (float32_t)block_size));
return num? sqrtf(sum / (num * (float32_t)block_size)): 0;
}