diff --git a/examples/client-publish-tcp.go b/examples/client-publish-tcp.go
index 229909de..419b0f3b 100644
--- a/examples/client-publish-tcp.go
+++ b/examples/client-publish-tcp.go
@@ -26,28 +26,28 @@ func getRtpH264SPSandPPS(pc net.PacketConn) ([]byte, []byte, error) {
 			return nil, nil, err
 		}
 
-		packet := &rtp.Packet{}
-		err = packet.Unmarshal(buf[:n])
+		pkt := &rtp.Packet{}
+		err = pkt.Unmarshal(buf[:n])
 		if err != nil {
 			return nil, nil, err
 		}
 
 		// require h264
-		if packet.PayloadType != 96 {
+		if pkt.PayloadType != 96 {
 			return nil, nil, fmt.Errorf("wrong payload type '%d', expected 96",
-				packet.PayloadType)
+				pkt.PayloadType)
 		}
 
 		// switch by NALU type
-		switch packet.Payload[0] & 0x1F {
+		switch pkt.Payload[0] & 0x1F {
 		case 0x07: // sps
-			sps = append([]byte(nil), packet.Payload...)
+			sps = append([]byte(nil), pkt.Payload...)
 			if sps != nil && pps != nil {
 				return sps, pps, nil
 			}
 
 		case 0x08: // pps
-			pps = append([]byte(nil), packet.Payload...)
+			pps = append([]byte(nil), pkt.Payload...)
 			if sps != nil && pps != nil {
 				return sps, pps, nil
 			}
diff --git a/examples/client-publish-udp.go b/examples/client-publish-udp.go
index 989b7c70..802fb496 100644
--- a/examples/client-publish-udp.go
+++ b/examples/client-publish-udp.go
@@ -26,28 +26,28 @@ func getRtpH264SPSandPPS(pc net.PacketConn) ([]byte, []byte, error) {
 			return nil, nil, err
 		}
 
-		packet := &rtp.Packet{}
-		err = packet.Unmarshal(buf[:n])
+		pkt := &rtp.Packet{}
+		err = pkt.Unmarshal(buf[:n])
 		if err != nil {
 			return nil, nil, err
 		}
 
 		// require h264
-		if packet.PayloadType != 96 {
+		if pkt.PayloadType != 96 {
 			return nil, nil, fmt.Errorf("wrong payload type '%d', expected 96",
-				packet.PayloadType)
+				pkt.PayloadType)
 		}
 
 		// switch by NALU type
-		switch packet.Payload[0] & 0x1F {
+		switch pkt.Payload[0] & 0x1F {
 		case 0x07: // sps
-			sps = append([]byte(nil), packet.Payload...)
+			sps = append([]byte(nil), pkt.Payload...)
 			if sps != nil && pps != nil {
 				return sps, pps, nil
 			}
 
 		case 0x08: // pps
-			pps = append([]byte(nil), packet.Payload...)
+			pps = append([]byte(nil), pkt.Payload...)
 			if sps != nil && pps != nil {
 				return sps, pps, nil
 			}
diff --git a/track.go b/track.go
index 85990279..0631b2b3 100644
--- a/track.go
+++ b/track.go
@@ -43,9 +43,35 @@ func NewTrackH264(id int, sps []byte, pps []byte) *Track {
 						"sprop-parameter-sets=" + spropParameterSets + "; " +
 						"profile-level-id=" + profileLevelId,
 				},
+			},
+		},
+	}
+}
+
+// NewTrackAac initializes an AAC track.
+func NewTrackAac(id int, sampleRate int, channelCount int, config []byte) *Track {
+	return &Track{
+		Id: id,
+		Media: &sdp.MediaDescription{
+			MediaName: sdp.MediaName{
+				Media:   "audio",
+				Protos:  []string{"RTP", "AVP"},
+				Formats: []string{"97"},
+			},
+			Attributes: []sdp.Attribute{
 				{
-					Key:   "control",
-					Value: "trackID=0",
+					Key: "rtpmap",
+					Value: "97 MPEG4-GENERIC/" + strconv.FormatInt(int64(sampleRate), 10) +
+						"/" + strconv.FormatInt(int64(channelCount), 10),
+				},
+				{
+					Key: "fmtp",
+					Value: "97 profile-level-id=1; " +
+						"mode=AAC-hbr; " +
+						"sizelength=13; " +
+						"indexlength=3; " +
+						"indexdeltalength=3; " +
+						"config=" + hex.EncodeToString(config),
 				},
 			},
 		},