diff --git a/libguac/include/protocol.h b/libguac/include/protocol.h
index fc73394d..fd5cffd9 100644
--- a/libguac/include/protocol.h
+++ b/libguac/include/protocol.h
@@ -271,6 +271,25 @@ int guac_protocol_send_select(guac_socket* socket, const char* protocol);
  */
 int guac_protocol_send_sync(guac_socket* socket, guac_timestamp timestamp);
 
+/* MEDIA INSTRUCTIONS */
+
+/**
+ * Sends an audio instruction over the given guac_socket connection.
+ *
+ * If an error occurs sending the instruction, a non-zero value is
+ * returned, and guac_error is set appropriately.
+ *
+ * @param socket The guac_socket connection to use.
+ * @param channel The index of the audio channel the sound should play on.
+ * @param mimetype The mimetype of the data being sent.
+ * @param duration The duration of the sound being sent, in milliseconds.
+ * @param data The audio data to be sent.
+ * @param size The number of bytes of audio data to send.
+ * @return Zero on success, non-zero on error.
+ */
+int guac_protocol_send_audio(guac_socket* socket, int channel,
+        const char* mimetype, int duration, void* data, int size);
+
 /* DRAWING INSTRUCTIONS */
 
 /**
diff --git a/libguac/src/protocol.c b/libguac/src/protocol.c
index eba527d7..44ff4233 100644
--- a/libguac/src/protocol.c
+++ b/libguac/src/protocol.c
@@ -399,6 +399,26 @@ int guac_protocol_send_arc(guac_socket* socket, const guac_layer* layer,
 
 }
 
+int guac_protocol_send_audio(guac_socket* socket, int channel,
+        const char* mimetype, int duration, void* data, int size) {
+
+    int base64_length = (size + 2) / 3 * 4;
+
+    return
+           guac_socket_write_string(socket, "5.audio,")
+        || __guac_socket_write_length_int(socket, channel)
+        || guac_socket_write_string(socket, ",")
+        || __guac_socket_write_length_string(socket, mimetype)
+        || guac_socket_write_string(socket, ",")
+        || __guac_socket_write_length_int(socket, duration)
+        || guac_socket_write_string(socket, ",")
+        || guac_socket_write_int(socket, base64_length)
+        || guac_socket_write_string(socket, ".")
+        || guac_socket_write_base64(socket, data, size)
+        || guac_socket_flush_base64(socket)
+        || guac_socket_write_string(socket, ";");
+
+}
 
 int guac_protocol_send_cfill(guac_socket* socket,
         guac_composite_mode mode, const guac_layer* layer,