diff --git a/settings.gradle.kts b/settings.gradle.kts
index 1c4c265..e303e1f 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -15,5 +15,5 @@ include(
     "xml", "jackson", "jsoup", "markdown", "network", "httpd",
     "properties", "serial-io",
     "mustache", "thymeleaf", "locale", "quartz", "sysinfo",
-    "imaging", "stream"
+    "imaging", "stream", "sound"
 )
diff --git a/sound/build.gradle.kts b/sound/build.gradle.kts
new file mode 100644
index 0000000..d2aab59
--- /dev/null
+++ b/sound/build.gradle.kts
@@ -0,0 +1,14 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+plugins {
+    id("elex-java")
+}
+
+dependencies {
+
+}
diff --git a/sound/src/main/java/kr/pe/elex/examples/Example.java b/sound/src/main/java/kr/pe/elex/examples/Example.java
new file mode 100644
index 0000000..225fb16
--- /dev/null
+++ b/sound/src/main/java/kr/pe/elex/examples/Example.java
@@ -0,0 +1,56 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.elex_project.abraxas.Console;
+import lombok.extern.slf4j.Slf4j;
+
+import javax.sound.sampled.*;
+
+@Slf4j
+public class Example {
+	public static void main(String... args) throws LineUnavailableException {
+		Console.writeLine("# Audio file formats");
+		for (AudioFileFormat.Type type : AudioSystem.getAudioFileTypes()) {
+			Console.writeLine("{} / {}", type.toString(), type.getExtension());
+		}
+
+		Console.writeLine("# Audio mixers");
+		for (Mixer.Info info : AudioSystem.getMixerInfo()) {
+			Console.writeLine("{} / {} / {}", info.getName(), info.getDescription(), info.getVendor());
+		}
+
+		Console.writeLine("# Getting a Line from mixer");
+		Mixer mixer = AudioSystem.getMixer(AudioSystem.getMixerInfo()[1]);
+		//mixer.sy
+		for (Line.Info info : mixer.getSourceLineInfo()) {
+			Console.writeLine("{}", info);
+			if (mixer.isLineSupported(info)) {
+				Line line = mixer.getLine(info);
+				//line.open();
+				//line.close();
+			}
+		}
+
+
+		Console.writeLine("# Getting a Line from Audio System");
+		AudioFormat audioFormat = new AudioFormat(441000,16,2, false,true);
+		TargetDataLine line;
+		DataLine.Info info = new DataLine.Info(TargetDataLine.class, audioFormat);
+		if (AudioSystem.isLineSupported(info)) {
+			line = (TargetDataLine) AudioSystem.getLine(info);
+			line.open(audioFormat);
+			line.close();
+		}
+
+		Console.writeLine("# Getting a Port from Audio System");
+		if (AudioSystem.isLineSupported(Port.Info.SPEAKER)) {
+			Port speakerPort = (Port) AudioSystem.getLine(Port.Info.SPEAKER);
+		}
+	}
+}
diff --git a/sound/src/main/java/kr/pe/elex/examples/Playback.java b/sound/src/main/java/kr/pe/elex/examples/Playback.java
new file mode 100644
index 0000000..498b4f2
--- /dev/null
+++ b/sound/src/main/java/kr/pe/elex/examples/Playback.java
@@ -0,0 +1,65 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import lombok.extern.slf4j.Slf4j;
+
+import javax.sound.sampled.*;
+import java.io.IOException;
+import java.util.Objects;
+
+@Slf4j
+public class Playback {
+
+	public static void main(String... args) throws UnsupportedAudioFileException, LineUnavailableException, IOException {
+		playback();
+
+		while (true) {
+
+		}
+	}
+
+	private static void playback() throws LineUnavailableException, UnsupportedAudioFileException, IOException {
+		AudioInputStream inputStream = AudioSystem.getAudioInputStream(Objects.requireNonNull(ClassLoader.
+				getSystemResourceAsStream("alarm_gentle.wav")));
+
+		SourceDataLine line = AudioSystem.getSourceDataLine(inputStream.getFormat());
+		line.open();
+		line.start();
+		line.addLineListener(event -> {
+			if (event.getType().equals(LineEvent.Type.OPEN)){
+
+			} else if (event.getType().equals(LineEvent.Type.START)) {
+
+			}else if (event.getType().equals(LineEvent.Type.STOP)) {
+
+			}else if (event.getType().equals(LineEvent.Type.CLOSE)) {
+
+			}
+		});
+		byte[] buffer = new byte[32];
+		int numRead = 0;
+		while ((numRead = inputStream.read(buffer, 0, buffer.length)) > 0) {
+			log.debug("read: {}", numRead);
+			line.write(buffer, 0, numRead);
+		}
+
+		inputStream.close();
+		line.close();
+	}
+
+	private static void playbackClip() throws LineUnavailableException, UnsupportedAudioFileException, IOException {
+		Clip clip = AudioSystem.getClip();
+		clip.open(AudioSystem.getAudioInputStream(Objects.requireNonNull(ClassLoader.
+				getSystemResourceAsStream("alarm_gentle.wav"))));
+		//clip.loop(3);
+		clip.start();
+
+		//clip.stop();
+	}
+}
diff --git a/sound/src/main/java/kr/pe/elex/examples/package-info.java b/sound/src/main/java/kr/pe/elex/examples/package-info.java
new file mode 100644
index 0000000..bfb14b8
--- /dev/null
+++ b/sound/src/main/java/kr/pe/elex/examples/package-info.java
@@ -0,0 +1,8 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
diff --git a/sound/src/main/resources/alarm_gentle.wav b/sound/src/main/resources/alarm_gentle.wav
new file mode 100755
index 0000000..99d5f61
Binary files /dev/null and b/sound/src/main/resources/alarm_gentle.wav differ
diff --git a/sound/src/main/resources/ringtone_minimal.wav b/sound/src/main/resources/ringtone_minimal.wav
new file mode 100755
index 0000000..f2c3192
Binary files /dev/null and b/sound/src/main/resources/ringtone_minimal.wav differ