diff --git a/source/SoundTouch/PeakFinder.cpp b/source/SoundTouch/PeakFinder.cpp
index 34db39b..5423c85 100644
--- a/source/SoundTouch/PeakFinder.cpp
+++ b/source/SoundTouch/PeakFinder.cpp
@@ -57,7 +57,7 @@ int PeakFinder::findTop(const float *data, int peakpos) const
 
     refvalue = data[peakpos];
 
-    // seek within �10 points
+    // seek within ±10 points
     start = peakpos - 10;
     if (start < minPos) start = minPos;
     end = peakpos + 10;
@@ -256,7 +256,7 @@ double PeakFinder::detectPeak(const float *data, int aminPos, int amaxPos)
 
         // accept harmonic peak if 
         // (a) it is found
-        // (b) is within �4% of the expected harmonic interval
+        // (b) is within ±4% of the expected harmonic interval
         // (c) has at least half x-corr value of the max. peak
 
         double diff = harmonic * peaktmp / highPeak;