Update documentation

Author: juzzlin

README.md

@@ -81,9 +81,10 @@ All Arctic Music Project songs:
 - MIDI CC automation
   - Select lines and add automation on the desired controller
   - Linear interpolation
-  - Sine wave interpolation (since 1.0.0+)
-- Pitch Bend automation (linear interpolation)  
+  - Sine wave (since 1.0.0+) and Random modulation (since 1.8.0+)
+- Pitch Bend automation
   - Select lines and add automation on pitch bend
+  - Linear, Sine wave, and Random modulation (since 1.8.0+)
 - Chord automation (since 1.2.0)
   - In Column Settings the user can set offsets for three notes that are relative to the root note
 - Step record / play notes via a MIDI controller (since 0.10.0)

src/view/qml/Manual.html

@@ -122,7 +122,7 @@ <h2 style="color: orange; border-bottom: 1px solid #444; margin-top: 20px;">Adva
 <h3 style="color: orange;">MIDI CC & Pitch Bend Automation</h3>
 <ul>
     <li><strong>Add Automation</strong>: Select a range of lines, right-click, and choose "Add MIDI CC Automation" or "Add Pitch Bend Automation".</li>
-    <li><strong>Interpolation</strong>: Choose between <strong>Linear</strong> for steady changes or <strong>Sine</strong> for organic, oscillating movements.</li>
+    <li><strong>Interpolation & Modulation</strong>: Choose <strong>Linear</strong> for steady changes, or add <strong>Modulation</strong> (Sine Wave or Random) for organic, oscillating, or experimental movements.</li>
 </ul>
 
 <h3 style="color: orange;">MIDI Side-chain</h3>