From 4cc026799c451f2d869f472d503de5ecbb6661fc Mon Sep 17 00:00:00 2001
From: Brian Gow <briangow@mit.edu>
Date: Mon, 15 Dec 2025 10:17:17 -0500
Subject: [PATCH] fix adc gain forumla

---
 wfdb/io/_signal.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wfdb/io/_signal.py b/wfdb/io/_signal.py
index 6bfafdb5..5bad70c1 100644
--- a/wfdb/io/_signal.py
+++ b/wfdb/io/_signal.py
@@ -792,7 +792,7 @@ def calc_adc_gain_baseline(self, ch, minvals, maxvals):
         if baseline > MAX_I32:
             # pmin maps to dmin, baseline maps to 2**31 - 1
             # pmax will map to a lower value than before
-            adc_gain = (MAX_I32) - dmin / abs(pmin)
+            adc_gain = (MAX_I32 - dmin) / abs(pmin)
             baseline = MAX_I32
         # This may happen if pmin > 0
         elif baseline < MIN_I32: