diff --git a/css/piano.css b/css/piano.css
index cdac3ec..815b22d 100644
--- a/css/piano.css
+++ b/css/piano.css
@@ -284,16 +284,16 @@ a {
 
 /* playback control */
 .main .control .switch-play-state {
-    background-image: url('../images/icons/play.png');
+    background-image: url('../images/icons/sidebar/play.png');
 }
 
 .main .control .switch-play-state.pause {
-    background-image: url('../images/icons/pause.png');
+    background-image: url('../images/icons/sidebar/pause.png');
 }
 
 /* channels */
 .main .control .open-channels-window {
-    background-image: url('../images/icons/channels.png');
+    background-image: url('../images/icons/sidebar/instruments.png');
 }
 
 /* set play speed */
@@ -323,7 +323,7 @@ a {
 
 /* close opened file */
 .main .control .close {
-    background-image: url('../images/icons/close.png');
+    background-image: url('../images/icons/sidebar/close.png');
     position: absolute;
     left: 9px;
     bottom: 0;
diff --git a/images/icons/sidebar/channels.png b/images/icons/sidebar/channels.png
deleted file mode 100644
index 783a69a..0000000
Binary files a/images/icons/sidebar/channels.png and /dev/null differ