diff --git a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
index 6682cfe..d24f474 100644
--- a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
+++ b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
@@ -82,7 +82,7 @@
         applyEffectAttributes(
             id,
             effect.type.ordinal,
-            effect.influence.value,
+            if (effect.active) effect.influence.value else 0f,
             effect.parameters[0].value
         )
     }

diff --git a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
index 6682cfe..d24f474 100644
--- a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
+++ b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
@@ -82,7 +82,7 @@
         applyEffectAttributes(
             id,
             effect.type.ordinal,
-            effect.influence.value,
+            if (effect.active) effect.influence.value else 0f,
             effect.parameters[0].value
         )
     }
diff --git a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
index dc20f7c..f921b1b 100644
--- a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
+++ b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
@@ -18,6 +18,12 @@
     }
     val influence = EffectParameter(influenceDescription, instrument)
 
+    var active: Boolean = false
+        set(value) {
+            field = value
+            instrument.updateEffects()
+        }
+
     companion object {
         val influenceDescription = EffectParameterDescription(0.0f, 1.0f, 0.0f) {
             "influence: ${it.percentageValue}%"

diff --git a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
index 6682cfe..d24f474 100644
--- a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
+++ b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
@@ -82,7 +82,7 @@
         applyEffectAttributes(
             id,
             effect.type.ordinal,
-            effect.influence.value,
+            if (effect.active) effect.influence.value else 0f,
             effect.parameters[0].value
         )
     }
diff --git a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
index dc20f7c..f921b1b 100644
--- a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
+++ b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
@@ -18,6 +18,12 @@
     }
     val influence = EffectParameter(influenceDescription, instrument)
 
+    var active: Boolean = false
+        set(value) {
+            field = value
+            instrument.updateEffects()
+        }
+
     companion object {
         val influenceDescription = EffectParameterDescription(0.0f, 1.0f, 0.0f) {
             "influence: ${it.percentageValue}%"
diff --git a/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt b/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
index 1577609..ebf4cb1 100644
--- a/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
+++ b/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
@@ -15,8 +15,10 @@
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import com.lukas.music.R
 import com.lukas.music.databinding.FragmentEffectBinding
 import com.lukas.music.instruments.effect.Effect
+import com.lukas.music.util.setupToggle
 import com.lukas.music.util.smartSetup
 
 class EffectFragment(private val effect: Effect) : Fragment() {
@@ -28,6 +30,10 @@
     ): View? {
         binding = FragmentEffectBinding.inflate(inflater)
         binding.effectName.text = effect.type.toString()
+        binding.activeButton.setupToggle(effect::active, R.color.blue) {
+            binding.activeButton.text = if (it) "ON" else "OFF"
+        }
+        binding.activeButton.text = if (effect.active) "ON" else "OFF"
         binding.influenceSeekBar.smartSetup(0, 100, effect.influence::percentageValue) {
             binding.influenceText.text = effect.influence.description.text(effect.influence)
         }

diff --git a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
index 6682cfe..d24f474 100644
--- a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
+++ b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
@@ -82,7 +82,7 @@
         applyEffectAttributes(
             id,
             effect.type.ordinal,
-            effect.influence.value,
+            if (effect.active) effect.influence.value else 0f,
             effect.parameters[0].value
         )
     }
diff --git a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
index dc20f7c..f921b1b 100644
--- a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
+++ b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
@@ -18,6 +18,12 @@
     }
     val influence = EffectParameter(influenceDescription, instrument)
 
+    var active: Boolean = false
+        set(value) {
+            field = value
+            instrument.updateEffects()
+        }
+
     companion object {
         val influenceDescription = EffectParameterDescription(0.0f, 1.0f, 0.0f) {
             "influence: ${it.percentageValue}%"
diff --git a/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt b/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
index 1577609..ebf4cb1 100644
--- a/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
+++ b/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
@@ -15,8 +15,10 @@
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import com.lukas.music.R
 import com.lukas.music.databinding.FragmentEffectBinding
 import com.lukas.music.instruments.effect.Effect
+import com.lukas.music.util.setupToggle
 import com.lukas.music.util.smartSetup
 
 class EffectFragment(private val effect: Effect) : Fragment() {
@@ -28,6 +30,10 @@
     ): View? {
         binding = FragmentEffectBinding.inflate(inflater)
         binding.effectName.text = effect.type.toString()
+        binding.activeButton.setupToggle(effect::active, R.color.blue) {
+            binding.activeButton.text = if (it) "ON" else "OFF"
+        }
+        binding.activeButton.text = if (effect.active) "ON" else "OFF"
         binding.influenceSeekBar.smartSetup(0, 100, effect.influence::percentageValue) {
             binding.influenceText.text = effect.influence.description.text(effect.influence)
         }
diff --git a/app/src/main/java/com/lukas/music/util/UIUtil.kt b/app/src/main/java/com/lukas/music/util/UIUtil.kt
index 9e2c520..b67d0ea 100644
--- a/app/src/main/java/com/lukas/music/util/UIUtil.kt
+++ b/app/src/main/java/com/lukas/music/util/UIUtil.kt
@@ -36,6 +36,9 @@
         override fun onStopTrackingTouch(seekBar: SeekBar) {
         }
     })
+    if (progress == initialProgress) {
+        callback(initialProgress)
+    }
     this.progress = initialProgress
 }
 

diff --git a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
index 6682cfe..d24f474 100644
--- a/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
+++ b/app/src/main/java/com/lukas/music/instruments/InternalInstrument.kt
@@ -82,7 +82,7 @@
         applyEffectAttributes(
             id,
             effect.type.ordinal,
-            effect.influence.value,
+            if (effect.active) effect.influence.value else 0f,
             effect.parameters[0].value
         )
     }
diff --git a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
index dc20f7c..f921b1b 100644
--- a/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
+++ b/app/src/main/java/com/lukas/music/instruments/effect/Effect.kt
@@ -18,6 +18,12 @@
     }
     val influence = EffectParameter(influenceDescription, instrument)
 
+    var active: Boolean = false
+        set(value) {
+            field = value
+            instrument.updateEffects()
+        }
+
     companion object {
         val influenceDescription = EffectParameterDescription(0.0f, 1.0f, 0.0f) {
             "influence: ${it.percentageValue}%"
diff --git a/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt b/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
index 1577609..ebf4cb1 100644
--- a/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
+++ b/app/src/main/java/com/lukas/music/ui/fragments/EffectFragment.kt
@@ -15,8 +15,10 @@
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import com.lukas.music.R
 import com.lukas.music.databinding.FragmentEffectBinding
 import com.lukas.music.instruments.effect.Effect
+import com.lukas.music.util.setupToggle
 import com.lukas.music.util.smartSetup
 
 class EffectFragment(private val effect: Effect) : Fragment() {
@@ -28,6 +30,10 @@
     ): View? {
         binding = FragmentEffectBinding.inflate(inflater)
         binding.effectName.text = effect.type.toString()
+        binding.activeButton.setupToggle(effect::active, R.color.blue) {
+            binding.activeButton.text = if (it) "ON" else "OFF"
+        }
+        binding.activeButton.text = if (effect.active) "ON" else "OFF"
         binding.influenceSeekBar.smartSetup(0, 100, effect.influence::percentageValue) {
             binding.influenceText.text = effect.influence.description.text(effect.influence)
         }
diff --git a/app/src/main/java/com/lukas/music/util/UIUtil.kt b/app/src/main/java/com/lukas/music/util/UIUtil.kt
index 9e2c520..b67d0ea 100644
--- a/app/src/main/java/com/lukas/music/util/UIUtil.kt
+++ b/app/src/main/java/com/lukas/music/util/UIUtil.kt
@@ -36,6 +36,9 @@
         override fun onStopTrackingTouch(seekBar: SeekBar) {
         }
     })
+    if (progress == initialProgress) {
+        callback(initialProgress)
+    }
     this.progress = initialProgress
 }
 
diff --git a/app/src/main/res/layout/fragment_effect.xml b/app/src/main/res/layout/fragment_effect.xml
index d5e0681..7f305be 100644
--- a/app/src/main/res/layout/fragment_effect.xml
+++ b/app/src/main/res/layout/fragment_effect.xml
@@ -35,11 +35,11 @@
                 android:id="@+id/influenceSeekBar"
                 android:layout_width="0dp"
                 android:layout_height="40dp"
-                android:layout_marginTop="16dp"
+                android:layout_marginTop="8dp"
                 android:layout_marginEnd="16dp"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toStartOf="@+id/effectName"
-                app:layout_constraintTop_toBottomOf="@+id/effectName" />
+                app:layout_constraintTop_toBottomOf="@+id/activeButton" />
 
             <TextView
                 android:id="@+id/influenceText"
@@ -89,6 +89,13 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toTopOf="@+id/parameter1SeekBar"
                 app:layout_constraintVertical_bias="0.0" />
+
+            <Button
+                android:id="@+id/activeButton"
+                android:layout_width="65dp"
+                android:layout_height="48dp"
+                app:layout_constraintEnd_toEndOf="@+id/influenceSeekBar"
+                app:layout_constraintTop_toTopOf="@+id/effectName" />
         </androidx.constraintlayout.widget.ConstraintLayout>
     </androidx.cardview.widget.CardView>