diff --git a/cogs/voice.py b/cogs/voice.py
index 51548c0..eecaa68 100644
--- a/cogs/voice.py
+++ b/cogs/voice.py
@@ -359,11 +359,12 @@ class VoiceCog(commands.Cog):
                         "-hide_banner",
                         "-i",
                         str(_input),
-                        "-c:a libopus",
+                        "-c:a",
+                        "libopus",
                         "-b:a",
                         "64k",
                         "-af",
-                        "volume=%d" % (level / 100),
+                        "volume=%.2f" % (level / 100),
                         "-vn",
                         str(output),
                     ),