diff --git a/client_read_test.go b/client_read_test.go
index 139575f3..53a5fd8c 100644
--- a/client_read_test.go
+++ b/client_read_test.go
@@ -59,7 +59,7 @@ func TestClientReadTracks(t *testing.T) {
 	track2 := &TrackMPEG4Audio{
 		PayloadType: 96,
 		Config: &mpeg4audio.Config{
-			Type:         2,
+			Type:         mpeg4audio.ObjectTypeAACLC,
 			SampleRate:   44100,
 			ChannelCount: 2,
 		},
@@ -71,7 +71,7 @@ func TestClientReadTracks(t *testing.T) {
 	track3 := &TrackMPEG4Audio{
 		PayloadType: 96,
 		Config: &mpeg4audio.Config{
-			Type:         2,
+			Type:         mpeg4audio.ObjectTypeAACLC,
 			SampleRate:   96000,
 			ChannelCount: 2,
 		},
diff --git a/examples/client-publish-codec-mpeg4audio/main.go b/examples/client-publish-codec-mpeg4audio/main.go
index 3e95cf9a..c072386a 100644
--- a/examples/client-publish-codec-mpeg4audio/main.go
+++ b/examples/client-publish-codec-mpeg4audio/main.go
@@ -38,7 +38,7 @@ func main() {
 	track := &gortsplib.TrackMPEG4Audio{
 		PayloadType: 96,
 		Config: &mpeg4audio.Config{
-			Type:         2,
+			Type:         mpeg4audio.ObjectTypeAACLC,
 			SampleRate:   48000,
 			ChannelCount: 2,
 		},
diff --git a/pkg/mpeg4audio/adts_test.go b/pkg/mpeg4audio/adts_test.go
index 166c8997..c2212c1d 100644
--- a/pkg/mpeg4audio/adts_test.go
+++ b/pkg/mpeg4audio/adts_test.go
@@ -16,7 +16,7 @@ var casesADTS = []struct {
 		[]byte{0xff, 0xf1, 0x4c, 0x80, 0x1, 0x3f, 0xfc, 0xaa, 0xbb},
 		ADTSPackets{
 			{
-				Type:         2,
+				Type:         ObjectTypeAACLC,
 				SampleRate:   48000,
 				ChannelCount: 2,
 				AU:           []byte{0xaa, 0xbb},
@@ -32,13 +32,13 @@ var casesADTS = []struct {
 		},
 		ADTSPackets{
 			{
-				Type:         2,
+				Type:         ObjectTypeAACLC,
 				SampleRate:   44100,
 				ChannelCount: 1,
 				AU:           []byte{0xaa, 0xbb},
 			},
 			{
-				Type:         2,
+				Type:         ObjectTypeAACLC,
 				SampleRate:   48000,
 				ChannelCount: 2,
 				AU:           []byte{0xcc, 0xdd},
diff --git a/pkg/mpeg4audio/config_test.go b/pkg/mpeg4audio/config_test.go
index 30e88ea2..ecc6c573 100644
--- a/pkg/mpeg4audio/config_test.go
+++ b/pkg/mpeg4audio/config_test.go
@@ -109,7 +109,7 @@ func TestConfigMarshalErrors(t *testing.T) {
 		{
 			"invalid channel config",
 			Config{
-				Type:         2,
+				Type:         ObjectTypeAACLC,
 				SampleRate:   44100,
 				ChannelCount: 0,
 			},
diff --git a/track_mpeg4audio_test.go b/track_mpeg4audio_test.go
index 24461515..bc7bf754 100644
--- a/track_mpeg4audio_test.go
+++ b/track_mpeg4audio_test.go
@@ -13,7 +13,7 @@ func TestTrackMPEG4AudioAttributes(t *testing.T) {
 	track := &TrackMPEG4Audio{
 		PayloadType: 96,
 		Config: &mpeg4audio.Config{
-			Type:         2,
+			Type:         mpeg4audio.ObjectTypeAACLC,
 			SampleRate:   48000,
 			ChannelCount: 2,
 		},
@@ -29,7 +29,7 @@ func TestTrackMPEG4AudioClone(t *testing.T) {
 	track := &TrackMPEG4Audio{
 		PayloadType: 96,
 		Config: &mpeg4audio.Config{
-			Type:         2,
+			Type:         mpeg4audio.ObjectTypeAACLC,
 			SampleRate:   48000,
 			ChannelCount: 2,
 		},
@@ -47,7 +47,7 @@ func TestTrackMPEG4AudioMediaDescription(t *testing.T) {
 	track := &TrackMPEG4Audio{
 		PayloadType: 96,
 		Config: &mpeg4audio.Config{
-			Type:         2,
+			Type:         mpeg4audio.ObjectTypeAACLC,
 			SampleRate:   48000,
 			ChannelCount: 2,
 		},
diff --git a/track_test.go b/track_test.go
index 5b79cd71..b5bea43a 100644
--- a/track_test.go
+++ b/track_test.go
@@ -75,7 +75,7 @@ func TestTrackNewFromMediaDescription(t *testing.T) {
 			&TrackMPEG4Audio{
 				PayloadType: 96,
 				Config: &mpeg4audio.Config{
-					Type:         2,
+					Type:         mpeg4audio.ObjectTypeAACLC,
 					SampleRate:   48000,
 					ChannelCount: 2,
 				},
@@ -106,7 +106,7 @@ func TestTrackNewFromMediaDescription(t *testing.T) {
 			&TrackMPEG4Audio{
 				PayloadType: 96,
 				Config: &mpeg4audio.Config{
-					Type:         2,
+					Type:         mpeg4audio.ObjectTypeAACLC,
 					SampleRate:   48000,
 					ChannelCount: 2,
 				},
@@ -137,7 +137,7 @@ func TestTrackNewFromMediaDescription(t *testing.T) {
 			&TrackMPEG4Audio{
 				PayloadType: 96,
 				Config: &mpeg4audio.Config{
-					Type:         2,
+					Type:         mpeg4audio.ObjectTypeAACLC,
 					SampleRate:   48000,
 					ChannelCount: 2,
 				},
@@ -172,7 +172,7 @@ func TestTrackNewFromMediaDescription(t *testing.T) {
 			&TrackMPEG4Audio{
 				PayloadType: 96,
 				Config: &mpeg4audio.Config{
-					Type:         2,
+					Type:         mpeg4audio.ObjectTypeAACLC,
 					SampleRate:   48000,
 					ChannelCount: 2,
 				},