diff --git a/phsource/ph_vietnam b/phsource/ph_vietnam
index 158438f3..28bc1f99 100644
--- a/phsource/ph_vietnam
+++ b/phsource/ph_vietnam
@@ -209,7 +209,7 @@ phoneme i
   FMT(vietnam/i)
   ELSE
 	//FMT(vowel/i_4)
-	FMT(vietnam/i_2)
+	FMT(vietnam/i)
 ENDIF
 endphoneme
 
diff --git a/phsource/vietnam/i b/phsource/vietnam/i
index 2a819fc3..f6c7291c 100644
Binary files a/phsource/vietnam/i and b/phsource/vietnam/i differ
diff --git a/phsource/vietnam/u b/phsource/vietnam/u
index 520a88f2..809e74e1 100644
Binary files a/phsource/vietnam/u and b/phsource/vietnam/u differ
diff --git a/src/windows/Debug/output_@.wav b/src/windows/Debug/output_@.wav
new file mode 100644
index 00000000..75ca577d
Binary files /dev/null and b/src/windows/Debug/output_@.wav differ
diff --git a/src/windows/Debug/output_i.wav b/src/windows/Debug/output_i.wav
new file mode 100644
index 00000000..7445bd21
Binary files /dev/null and b/src/windows/Debug/output_i.wav differ