diff --git a/src/sfizz/Config.h b/src/sfizz/Config.h
index ad3e82ee..97061613 100644
--- a/src/sfizz/Config.h
+++ b/src/sfizz/Config.h
@@ -56,8 +56,8 @@ namespace config {
     constexpr int numVoices { 64 };
     constexpr unsigned maxVoices { 256 };
     constexpr unsigned smoothingSteps { 512 };
-    constexpr uint8_t xfadeSmoothing { 5 };
-    constexpr uint8_t gainSmoothing { 0 };
+    constexpr uint16_t xfadeSmoothing { 5 };
+    constexpr uint16_t gainSmoothing { 0 };
     constexpr unsigned powerTableSizeExponent { 11 };
     constexpr int maxFilePromises { maxVoices };
     constexpr int allSoundOffCC { 120 };
diff --git a/src/sfizz/Defaults.cpp b/src/sfizz/Defaults.cpp
index 6921be22..b01a8f77 100644
--- a/src/sfizz/Defaults.cpp
+++ b/src/sfizz/Defaults.cpp
@@ -58,7 +58,7 @@ FloatSpec hiNormalized { 1.0f, {0.0f, 1.0f}, 0 };
 FloatSpec loBipolar { -1.0f, {-1.0f, 1.0f}, 0 };
 FloatSpec hiBipolar { 1.0f, {-1.0f, 1.0f}, 0 };
 UInt16Spec ccNumber { 0, {0, config::numCCs}, 0 };
-UInt8Spec smoothCC { 0, {0, 100}, 0 };
+UInt16Spec smoothCC { 0, {0, 100}, kPermissiveUpperBound };
 UInt8Spec curveCC { 0, {0, 255}, 0 };
 UInt8Spec sustainCC { 64, {0, 127}, 0 };
 FloatSpec sustainThreshold { 1.0f, {0.0f, 127.0f}, kNormalizeMidi };
diff --git a/src/sfizz/Defaults.h b/src/sfizz/Defaults.h
index f9850390..8e0dec68 100644
--- a/src/sfizz/Defaults.h
+++ b/src/sfizz/Defaults.h
@@ -159,7 +159,7 @@ namespace Default
     extern const OpcodeSpec<float> hiChannelAftertouch;
     extern const OpcodeSpec<uint16_t> ccNumber;
     extern const OpcodeSpec<uint8_t> curveCC;
-    extern const OpcodeSpec<uint8_t> smoothCC;
+    extern const OpcodeSpec<uint16_t> smoothCC;
     extern const OpcodeSpec<uint8_t> sustainCC;
     extern const OpcodeSpec<bool> checkSustain;
     extern const OpcodeSpec<bool> checkSostenuto;
diff --git a/src/sfizz/Region.h b/src/sfizz/Region.h
index 6244424f..89e720ac 100644
--- a/src/sfizz/Region.h
+++ b/src/sfizz/Region.h
@@ -464,7 +464,7 @@ struct Region {
     float bendUp { Default::bendUp };
     float bendDown { Default::bendDown };
     float bendStep { Default::bendStep };
-    uint8_t bendSmooth { Default::smoothCC };
+    uint16_t bendSmooth { Default::smoothCC };
 
     // Envelopes
     EGDescription amplitudeEG;
diff --git a/src/sfizz/Smoothers.cpp b/src/sfizz/Smoothers.cpp
index df935bc6..df17280e 100644
--- a/src/sfizz/Smoothers.cpp
+++ b/src/sfizz/Smoothers.cpp
@@ -20,7 +20,7 @@ OnePoleSmoother::OnePoleSmoother()
 {
 }
 
-void OnePoleSmoother::setSmoothing(uint8_t smoothValue, float sampleRate)
+void OnePoleSmoother::setSmoothing(unsigned smoothValue, float sampleRate)
 {
     smoothing = (smoothValue > 0);
     if (smoothing) {
@@ -62,7 +62,7 @@ LinearSmoother::LinearSmoother()
 {
 }
 
-void LinearSmoother::setSmoothing(uint8_t smoothValue, float sampleRate)
+void LinearSmoother::setSmoothing(unsigned smoothValue, float sampleRate)
 {
     const float smoothTime = 1e-3f * smoothValue;
     smoothFrames_ = static_cast<int32_t>(smoothTime * sampleRate);
diff --git a/src/sfizz/Smoothers.h b/src/sfizz/Smoothers.h
index e62190eb..0527e96d 100644
--- a/src/sfizz/Smoothers.h
+++ b/src/sfizz/Smoothers.h
@@ -24,7 +24,7 @@ public:
      * @param smoothValue
      * @param sampleRate
      */
-    void setSmoothing(uint8_t smoothValue, float sampleRate);
+    void setSmoothing(unsigned smoothValue, float sampleRate);
     /**
      * @brief Reset the filter state to a given value
      *
@@ -63,7 +63,7 @@ public:
      * @param smoothValue
      * @param sampleRate
      */
-    void setSmoothing(uint8_t smoothValue, float sampleRate);
+    void setSmoothing(unsigned smoothValue, float sampleRate);
     /**
      * @brief Reset the filter state to a given value
      *
diff --git a/src/sfizz/modulations/ModKey.cpp b/src/sfizz/modulations/ModKey.cpp
index 55d9cee5..5dbdc057 100644
--- a/src/sfizz/modulations/ModKey.cpp
+++ b/src/sfizz/modulations/ModKey.cpp
@@ -56,7 +56,7 @@ ModKey::Parameters& ModKey::Parameters::operator=(Parameters&& other) noexcept
     return *this;
 }
 
-ModKey ModKey::createCC(uint16_t cc, uint8_t curve, uint8_t smooth, float step)
+ModKey ModKey::createCC(uint16_t cc, uint8_t curve, uint16_t smooth, float step)
 {
     ModKey::Parameters p;
     p.cc = cc;
diff --git a/src/sfizz/modulations/ModKey.h b/src/sfizz/modulations/ModKey.h
index 9498ee39..69dc50b3 100644
--- a/src/sfizz/modulations/ModKey.h
+++ b/src/sfizz/modulations/ModKey.h
@@ -28,7 +28,7 @@ public:
     explicit ModKey(ModId id, NumericId<Region> region = {}, Parameters params = {})
         : id_(id), region_(region), params_(params), flags_(ModIds::flags(id_)) {}
 
-    static ModKey createCC(uint16_t cc, uint8_t curve, uint8_t smooth, float step);
+    static ModKey createCC(uint16_t cc, uint8_t curve, uint16_t smooth, float step);
     static ModKey createNXYZ(ModId id, NumericId<Region> region = {}, uint8_t N = 0, uint8_t X = 0, uint8_t Y = 0, uint8_t Z = 0);
 
     explicit operator bool() const noexcept { return id_ != ModId(); }
@@ -45,7 +45,7 @@ public:
     struct RawParameters {
         union {
             //! Parameters if this key identifies a CC source
-            struct { uint16_t cc; uint8_t curve, smooth; float step; };
+            struct { uint16_t cc; uint8_t curve; uint16_t smooth; float step; };
             //! Parameters otherwise, based on the related opcode
             // eg. `N` in `lfoN`, `N, X` in `lfoN_eqX`
             struct { uint8_t N, X, Y, Z; };