diff --git a/Userland/Applications/Piano/KnobsWidget.cpp b/Userland/Applications/Piano/KnobsWidget.cpp
index 4c9c7538cb4..59d332716e1 100644
--- a/Userland/Applications/Piano/KnobsWidget.cpp
+++ b/Userland/Applications/Piano/KnobsWidget.cpp
@@ -104,11 +104,6 @@ KnobsWidget::KnobsWidget(TrackManager& track_manager, MainWidget& main_widget)
     }
 }
 
-void KnobsWidget::cycle_waveform()
-{
-    m_synth_waveform->set_selected_index((m_synth_waveform->selected_index() + 1) % m_synth_waveform->model()->row_count());
-}
-
 void KnobsWidget::update_knobs()
 {
     // FIXME: This is needed because when the slider is changed normally, we
diff --git a/Userland/Applications/Piano/KnobsWidget.h b/Userland/Applications/Piano/KnobsWidget.h
index af3d55a3528..b8d9fefcb93 100644
--- a/Userland/Applications/Piano/KnobsWidget.h
+++ b/Userland/Applications/Piano/KnobsWidget.h
@@ -26,7 +26,6 @@ public:
     virtual ~KnobsWidget() override = default;
 
     void update_knobs();
-    void cycle_waveform();
 
 private:
     KnobsWidget(TrackManager&, MainWidget&);
diff --git a/Userland/Applications/Piano/MainWidget.cpp b/Userland/Applications/Piano/MainWidget.cpp
index b413a382984..e95ae70d017 100644
--- a/Userland/Applications/Piano/MainWidget.cpp
+++ b/Userland/Applications/Piano/MainWidget.cpp
@@ -115,9 +115,6 @@ void MainWidget::special_key_action(int key_code)
     case Key_X:
         set_octave_and_ensure_note_change(DSP::Keyboard::Direction::Up);
         break;
-    case Key_C:
-        m_knobs_widget->cycle_waveform();
-        break;
     case Key_Space:
         m_player_widget->toggle_paused();
         break;