Sound apps: enhance description in README & javadocs, add link to YT video

Author: andrei-punko

sound-recorder-n-spectrum-analyzer/README.md

@@ -1,6 +1,10 @@
 
+# List of projects
+
 ## Microphone sound recorder/player
 Use [sound-recorder.bat](sound-recorder.bat) script to start application
 
-## Microphone sound spectrum analyzer
+## Application that shows real-time spectrum of sound
 Use [spectrum-analyzer.bat](spectrum-analyzer.bat) script to start application
+
+Check [YouTube video](https://youtu.be/OfHj-EmXh2k) with description of project

sound-recorder-n-spectrum-analyzer/src/main/java/by/andd3dfx/capturesound/AudioCaptureApp.java

@@ -17,12 +17,15 @@
 import java.io.InputStream;
 
 /**
+ * <pre>
+ * Microphone sound recorder/player
+ *
  * Press [Start] button to start recording
- * <p>
  * Press [Stop] button to stop recording
- * <p>
- * Press [Playback] button to start play of recorded audio.
+ * Press [Playback] button to start play of recorded audio
+ *
  * Main frequency printed into console after that
+ * </pre>
  */
 public class AudioCaptureApp extends JFrame {
 

sound-recorder-n-spectrum-analyzer/src/main/java/by/andd3dfx/capturesound/ShowRealTimeSpectrumApp.java

@@ -15,7 +15,9 @@
 import java.util.Arrays;
 
 /**
- * Application that shows real-time spectrum
+ * Application that shows real-time spectrum of sound
+ *
+ * @see <a href="https://youtu.be/OfHj-EmXh2k">Youtube video</a> with project description
  */
 public class ShowRealTimeSpectrumApp {