From 47a740a61c264c7bb89347ad02cef5810c1746ba Mon Sep 17 00:00:00 2001
From: Thomas Grill <gr@grrrr.org>
Date: Tue, 18 Aug 2026 21:31:25 +0200
Subject: [PATCH] Avoid NANs when no blocks have been processed

---
 analyze_rms_f32.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/analyze_rms_f32.cpp b/analyze_rms_f32.cpp
index 5890cc0..b750da6 100644
--- a/analyze_rms_f32.cpp
+++ b/analyze_rms_f32.cpp
@@ -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;
 }