diff --git a/vinetrimmer/objects/tracks.py b/vinetrimmer/objects/tracks.py
index c475d3e..bc4d96a 100644
--- a/vinetrimmer/objects/tracks.py
+++ b/vinetrimmer/objects/tracks.py
@@ -892,6 +892,7 @@ class MenuTrack:
 
 
 class Tracks:
+	AUDIO_CODEC_MAP = {"EC3": "ec-3", "AAC": "mp4a"}
 	"""
 	Tracks.
 	Stores video, audio, and subtitle tracks. It also stores chapter/menu entries.
@@ -1190,7 +1191,7 @@ class Tracks:
 		if not with_descriptive:
 			self.audios = [x for x in self.audios if not x.descriptive]
 		if by_codec:
-			codec_audio = list(filter(lambda x: any(y for y in self.AUDIO_CODEC_MAP[by_codec] if y in x.codec), self.audio))
+			codec_audio = list(filter(lambda x: any(y for y in self.AUDIO_CODEC_MAP[by_codec] if y in x.codec), self.audios))
 			if not codec_audio and not should_fallback:
 				raise ValueError(f"There's no {by_codec} audio tracks. Aborting.")
 			else: