diff --git a/toonz/sources/common/tsound/tsop.cpp b/toonz/sources/common/tsound/tsop.cpp
index 41bdebe..f3a3678 100644
--- a/toonz/sources/common/tsound/tsop.cpp
+++ b/toonz/sources/common/tsound/tsop.cpp
@@ -967,7 +967,7 @@ TSoundTrackP TSop::gate(TSoundTrackP src, double threshold, double holdTime,
 
 //==============================================================================
 
-TSoundTrackP TSop::timeStrech(TSoundTrackP src, double ratio) {
+TSoundTrackP TSop::timeStretch(TSoundTrackP src, double ratio) {
   TINT32 sampleRate = (TINT32)(src->getSampleRate() * ratio);
 
   if (sampleRate > 100000) sampleRate = 100000;
diff --git a/toonz/sources/include/tsop.h b/toonz/sources/include/tsop.h
index 5fbfba3..ca2b777 100644
--- a/toonz/sources/include/tsop.h
+++ b/toonz/sources/include/tsop.h
@@ -71,10 +71,10 @@ DVAPI void echo(TSoundTrackP &dst, const TSoundTrackP &src, double delayTime,
                 double decayFactor, double extendTime);
 
 /*!
-    Streches the soundtrack src with the specified feature and
+    Stretches the soundtrack src with the specified feature and
     returns the obtained soundtrack
   */
-DVAPI TSoundTrackP timeStrech(TSoundTrackP src, double ratio);
+DVAPI TSoundTrackP timeStretch(TSoundTrackP src, double ratio);
 
 /*!
     Do the mixing between the two soundtrack a1 and a2 must be inside [0.0,1.0]