diff --git a/pkg/formats/format_test.go b/pkg/formats/format_test.go
index 02997e4d..2354627d 100644
--- a/pkg/formats/format_test.go
+++ b/pkg/formats/format_test.go
@@ -711,6 +711,59 @@ func TestUnmarshalMPEG4AudioGenericErrors(t *testing.T) {
 	require.Error(t, err)
 }
 
+func TestUnmarshalMPEG4AudioLATMErrors(t *testing.T) {
+	_, err := Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"profile-level-id": "aaa",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"bitrate": "aaa",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"object": "aaa",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"object": "120",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"cpresent": "aaa",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"config": "aaa",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"sbr-enabled": "aaa",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"profile-level-id": "15",
+		"cpresent":         "0",
+		"config":           "400026103fc0",
+		"sbr-enabled":      "1",
+	})
+	require.Error(t, err)
+
+	_, err = Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
+		"profile-level-id": "15",
+		"object":           "2",
+		"cpresent":         "0",
+		"sbr-enabled":      "1",
+	})
+	require.Error(t, err)
+}
+
 func FuzzUnmarshalH264(f *testing.F) {
 	f.Fuzz(func(t *testing.T, sps string, pktMode string) {
 		Unmarshal("video", 96, "H264/90000", map[string]string{
@@ -737,19 +790,6 @@ func FuzzUnmarshalLPCM(f *testing.F) {
 	})
 }
 
-func FuzzUnmarshalMPEG4AudioLATM(f *testing.F) {
-	f.Fuzz(func(t *testing.T, a, b, c, d, e, f string) {
-		Unmarshal("audio", 96, "MP4A-LATM/48000/2", map[string]string{
-			"profile-level-id": a,
-			"bitrate":          b,
-			"object":           c,
-			"cpresent":         d,
-			"config":           e,
-			"sbr-enabled":      f,
-		})
-	})
-}
-
 func FuzzUnmarshalMPEG4VideoES(f *testing.F) {
 	f.Fuzz(func(t *testing.T, a, b string) {
 		Unmarshal("video", 96, "MP4V-ES/90000", map[string]string{
diff --git a/pkg/formats/mpeg4_audio_latm.go b/pkg/formats/mpeg4_audio_latm.go
index f34d4434..2cfca285 100644
--- a/pkg/formats/mpeg4_audio_latm.go
+++ b/pkg/formats/mpeg4_audio_latm.go
@@ -6,6 +6,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4audio"
 	"github.com/pion/rtp"
 )
 
@@ -17,7 +18,7 @@ type MPEG4AudioLATM struct {
 	Channels       int
 	ProfileLevelID int
 	Bitrate        *int
-	Object         int
+	Object         mpeg4audio.ObjectType
 	CPresent       *bool
 	Config         []byte
 	SBREnabled     *bool
@@ -84,10 +85,18 @@ func (f *MPEG4AudioLATM) unmarshal(
 		case "object":
 			tmp, err := strconv.ParseInt(val, 10, 64)
 			if err != nil {
-				return fmt.Errorf("invalid object: %v", val)
+				return fmt.Errorf("invalid object type: %v", val)
 			}
 
-			f.Object = int(tmp)
+			f.Object = mpeg4audio.ObjectType(int(tmp))
+
+			switch f.Object {
+			case mpeg4audio.ObjectTypeAACLC,
+				mpeg4audio.ObjectTypeSBR,
+				mpeg4audio.ObjectTypePS:
+			default:
+				return fmt.Errorf("unsupported object type: %d", f.Object)
+			}
 
 		case "cpresent":
 			tmp, err := strconv.ParseInt(val, 10, 64)
diff --git a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/3570da660901e702 b/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/3570da660901e702
deleted file mode 100644
index 2587b1e7..00000000
--- a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/3570da660901e702
+++ /dev/null
@@ -1,7 +0,0 @@
-go test fuzz v1
-string("%20")
-string("")
-string("oc\x97\xf3V\x8e\xe0")
-string("")
-string("\x0f\x11")
-string("Z")
diff --git a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/400020fb8be5431f b/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/400020fb8be5431f
deleted file mode 100644
index ef04c2ae..00000000
--- a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/400020fb8be5431f
+++ /dev/null
@@ -1,7 +0,0 @@
-go test fuzz v1
-string("")
-string("")
-string("")
-string("")
-string("")
-string("0")
diff --git a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/b95227f0e71f8fa1 b/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/b95227f0e71f8fa1
deleted file mode 100644
index 321e624d..00000000
--- a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/b95227f0e71f8fa1
+++ /dev/null
@@ -1,7 +0,0 @@
-go test fuzz v1
-string("")
-string("")
-string("oc\x97\xf3V\x8e\xe0")
-string("")
-string("9A")
-string("X")
diff --git a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/c440c66d0e8a2f04 b/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/c440c66d0e8a2f04
deleted file mode 100644
index e61f676a..00000000
--- a/pkg/formats/testdata/fuzz/FuzzUnmarshalMPEG4AudioLATM/c440c66d0e8a2f04
+++ /dev/null
@@ -1,7 +0,0 @@
-go test fuzz v1
-string("")
-string("")
-string("oc\x97\xf3V\x8e\xe0")
-string("")
-string("\x0f\x11")
-string("0")