diff --git a/client/src/pages/Game/components/MusicSlider/MusicSlider.jsx b/client/src/pages/Game/components/MusicSlider/MusicSlider.jsx
index 63045de..f74082a 100644
--- a/client/src/pages/Game/components/MusicSlider/MusicSlider.jsx
+++ b/client/src/pages/Game/components/MusicSlider/MusicSlider.jsx
@@ -1,6 +1,21 @@
 import { useState, useEffect, useRef, useCallback } from 'react';
 import "./styles.sass";
 
+const frequencyToNote = (frequency) => {
+  const A4 = 440;
+  const notes = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B'];
+
+  const halfSteps = Math.round(12 * Math.log2(frequency / A4));
+
+  const A4Index = notes.indexOf('A');
+  let noteIndex = (A4Index + halfSteps) % 12;
+  if (noteIndex < 0) noteIndex += 12;
+
+  const octave = 4 + Math.floor((halfSteps + A4Index) / 12);
+  
+  return `${notes[noteIndex]}${octave}`;
+};
+
 export const MusicSlider = ({ isReadOnly, onFrequencyChange, frequency: externalFrequency, composerIsPlaying }) => {
   const [audioContext, setAudioContext] = useState(null);
   const [oscillator, setOscillator] = useState(null);
@@ -187,6 +202,25 @@ export const MusicSlider = ({ isReadOnly, onFrequencyChange, frequency: external
     return `${Math.max(0, Math.min(pos, 100))}%`;
   };
 
+  const getMouthSize = () => {
+    const minSize = 30;
+    const maxSize = 60;
+    const freqRange = 880;
+    const sizeRange = maxSize - minSize;
+    const relativeFreq = frequency.current - 220;
+    const size = minSize + (relativeFreq / freqRange) * sizeRange;
+    return Math.max(minSize, Math.min(maxSize, size));
+  };
+
+  const shouldShowNoteMarker = () => {
+    if (!isReadOnly) return isDragging.current;
+    return composerIsPlaying;
+  };
+
+  if (isReadOnly && !composerIsPlaying) {
+    return null;
+  }
+
   return (
     <div className="otamatone-container">
       <div className="otamatone">
@@ -195,22 +229,32 @@ export const MusicSlider = ({ isReadOnly, onFrequencyChange, frequency: external
             <div className="eye left-eye"></div>
             <div className="eye right-eye"></div>
           </div>
-          <div className="otamatone-mouth"></div>
+          <div 
+            className="otamatone-mouth"
+            style={{
+              width: `${getMouthSize()}px`,
+              height: `${getMouthSize()}px`
+            }}
+          ></div>
         </div>
-        <div 
-          ref={sliderRef}
-          className={`otamatone-neck ${!isReadOnly ? 'interactive' : ''}`}
-          style={{ cursor: isReadOnly ? 'default' : 'pointer' }}
-        >
-          <div
-            className={`frequency-indicator ${isReadOnly ? 'read-only' : ''} ${composerIsPlaying ? 'active' : ''}`}
-            style={{ left: getFrequencyPosition() }}
+        {(!isReadOnly || composerIsPlaying) && (
+          <div 
+            ref={sliderRef}
+            className={`otamatone-neck ${!isReadOnly ? 'interactive' : ''}`}
+            style={{ cursor: isReadOnly ? 'default' : 'pointer' }}
           >
-            <div className="note-marker">
-              {(!isReadOnly && isDragging.current) && Math.round(frequency.current)}
+            <div
+              className={`frequency-indicator ${isReadOnly ? 'read-only' : ''} ${composerIsPlaying ? 'active' : ''}`}
+              style={{ left: getFrequencyPosition() }}
+            >
+              {shouldShowNoteMarker() && (
+                <div className="note-marker">
+                  {frequencyToNote(frequency.current)}
+                </div>
+              )}
             </div>
           </div>
-        </div>
+        )}
       </div>
     </div>
   );
diff --git a/client/src/pages/Game/components/MusicSlider/styles.sass b/client/src/pages/Game/components/MusicSlider/styles.sass
index 12b1ca4..40a9e34 100644
--- a/client/src/pages/Game/components/MusicSlider/styles.sass
+++ b/client/src/pages/Game/components/MusicSlider/styles.sass
@@ -104,10 +104,23 @@
 .note-marker
   position: absolute
   top: -50px
-  font-size: 32pt
+  font-size: 24pt
   color: $white
   text-shadow: 0 0 15px rgba(255, 255, 255, 0.7)
   font-weight: bold
+  font-family: 'Arial', sans-serif
+  background: rgba(0, 0, 0, 0.6)
+  padding: 2px 8px
+  border-radius: 8px
+  backdrop-filter: blur(5px)
+  min-width: 60px
+  text-align: center
+  animation: note-pop 0.2s ease-out
+  opacity: 1
+  
+  .read-only &
+    background: rgba(0, 0, 0, 0.8)
+    box-shadow: 0 0 20px rgba(0, 0, 0, 0.4)
 
 .otamatone-face
   width: 140px
@@ -169,10 +182,11 @@
   border-radius: 50%
   position: absolute
   bottom: 30px
-  width: 30px
-  height: 30px
-  transition: all 0.3s ease
-  animation: mouth-pulse 5s infinite alternate ease-in-out
+  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275)
+  transform-origin: center center
+
+  &.active
+    animation: mouth-pulse 0.5s infinite alternate ease-in-out
 
 @keyframes blink
   0%, 90%, 100%
@@ -200,4 +214,14 @@
     opacity: 0
   100%
     transform: translateY(0)
+    opacity: 1
+
+@keyframes note-pop
+  0%
+    transform: scale(0.8)
+    opacity: 0.5
+  50%
+    transform: scale(1.1)
+  100%
+    transform: scale(1)
     opacity: 1
\ No newline at end of file