diff --git a/src/RubberBandStretcher.cpp b/src/RubberBandStretcher.cpp
index e4a7d43..8e62e33 100644
--- a/src/RubberBandStretcher.cpp
+++ b/src/RubberBandStretcher.cpp
@@ -42,7 +42,7 @@ RubberBandStretcher::RubberBandStretcher(size_t sampleRate,
     m_r3d
     ((options & OptionEngineFiner) ?
      new R3StretcherImpl(R3StretcherImpl::Parameters
-                         (sampleRate, channels, options),
+                         (double(sampleRate), channels, options),
                          initialTimeRatio, initialPitchScale)
      : nullptr)
 {
diff --git a/src/common/MovingMedian.h b/src/common/MovingMedian.h
index 48fcd39..e7ede71 100644
--- a/src/common/MovingMedian.h
+++ b/src/common/MovingMedian.h
@@ -97,7 +97,7 @@ public:
         if (m_percentile == fifty) { // exact default value
             return m_sortspace[n / 2];
         } else {
-            int index = float(n) * m_percentile / 100.f;
+            int index = int(floorf(float(n) * m_percentile / 100.f));
             if (index >= m_fill) index = m_fill - 1;
             return m_sortspace[index];
         }
diff --git a/src/common/Window.h b/src/common/Window.h
index 58a2eeb..2800c7e 100644
--- a/src/common/Window.h
+++ b/src/common/Window.h
@@ -111,7 +111,7 @@ protected:
     T m_area;
     
     void encache();
-    void cosinewin(T *, T, T, T, T);
+    void cosinewin(T *, double, double, double, double);
 };
 
 template <typename T>
@@ -248,14 +248,14 @@ void Window<T>::encache()
 }
 
 template <typename T>
-void Window<T>::cosinewin(T *mult, T a0, T a1, T a2, T a3)
+void Window<T>::cosinewin(T *mult, double a0, double a1, double a2, double a3)
 {
     int n = int(m_size);
     for (int i = 0; i < n; ++i) {
-        mult[i] *= (a0
-                    - a1 * cos(2 * M_PI * i / n)
-                    + a2 * cos(4 * M_PI * i / n)
-                    - a3 * cos(6 * M_PI * i / n));
+        mult[i] = T(mult[i] * (a0
+                               - a1 * cos(2 * M_PI * i / n)
+                               + a2 * cos(4 * M_PI * i / n)
+                               - a3 * cos(6 * M_PI * i / n)));
     }
 }
 
diff --git a/src/finer/R3StretcherImpl.cpp b/src/finer/R3StretcherImpl.cpp
index af605a1..c0b7412 100644
--- a/src/finer/R3StretcherImpl.cpp
+++ b/src/finer/R3StretcherImpl.cpp
@@ -392,7 +392,7 @@ R3StretcherImpl::process(const float *const *input, size_t samples, bool final)
     if (!isRealTime() && !m_keyFrameMap.empty()) {
         if (m_mode == ProcessMode::Studying) {
             m_totalTargetDuration =
-                round(m_studyInputDuration * getEffectiveRatio());
+                size_t(round(m_studyInputDuration * getEffectiveRatio()));
         }
     }