diff --git a/infer/lib/audio.py b/infer/lib/audio.py
index 9b55787..89799ab 100644
--- a/infer/lib/audio.py
+++ b/infer/lib/audio.py
@@ -5,10 +5,10 @@ import av
 
 
 def wav2(i, o, format):
-    inp = av.open(i, "rb")
+    inp = av.open(i, "r")
     if format == "m4a":
         format = "mp4"
-    out = av.open(o, "wb", format=format)
+    out = av.open(o, "w", format=format)
     if format == "ogg":
         format = "libvorbis"
     if format == "mp4":