diff --git a/include/boo/audiodev/IAudioVoice.hpp b/include/boo/audiodev/IAudioVoice.hpp
index e4ab240..ded59b8 100644
--- a/include/boo/audiodev/IAudioVoice.hpp
+++ b/include/boo/audiodev/IAudioVoice.hpp
@@ -69,7 +69,7 @@ struct IAudioVoice
     virtual void setStereoMatrixCoefficients(const float coefs[8][2])=0;
 
     /** Called by client to dynamically adjust the pitch of voices with dynamic pitch enabled */
-    virtual void setPitchRatio(double ratio)=0;
+    virtual void setPitchRatio(double ratio, bool slew)=0;
 
     /** Instructs platform to begin consuming sample data; invoking callback as needed */
     virtual void start()=0;
diff --git a/lib/audiodev/AudioVoice.cpp b/lib/audiodev/AudioVoice.cpp
index a647206..84839e8 100644
--- a/lib/audiodev/AudioVoice.cpp
+++ b/lib/audiodev/AudioVoice.cpp
@@ -16,11 +16,11 @@ AudioVoice::~AudioVoice()
     soxr_delete(m_src);
 }
 
-void AudioVoice::_setPitchRatio(double ratio)
+void AudioVoice::_setPitchRatio(double ratio, bool slew)
 {
     if (m_dynamicRate)
     {
-        soxr_error_t err = soxr_set_io_ratio(m_src, ratio * m_sampleRateIn / m_sampleRateOut, 0);
+        soxr_error_t err = soxr_set_io_ratio(m_src, ratio * m_sampleRateIn / m_sampleRateOut, slew ? m_5msFrames : 0);
         if (err)
         {
             Log.report(logvisor::Fatal, "unable to set resampler rate: %s", soxr_strerror(err));
@@ -36,13 +36,14 @@ void AudioVoice::_midUpdate()
     if (m_resetSampleRate)
         _resetSampleRate(m_deferredSampleRate);
     if (m_setPitchRatio)
-        _setPitchRatio(m_pitchRatio);
+        _setPitchRatio(m_pitchRatio, m_slew);
 }
 
-void AudioVoice::setPitchRatio(double ratio)
+void AudioVoice::setPitchRatio(double ratio, bool slew)
 {
     m_setPitchRatio = true;
     m_pitchRatio = ratio;
+    m_slew = slew;
 }
 
 void AudioVoice::resetSampleRate(double sampleRate)
@@ -100,7 +101,7 @@ void AudioVoiceMono::_resetSampleRate(double sampleRate)
     m_sampleRateOut = rateOut;
     m_5msFrames = rateOut * 5 / 1000;
     soxr_set_input_fn(m_src, soxr_input_fn_t(SRCCallback), this, 0);
-    _setPitchRatio(m_pitchRatio);
+    _setPitchRatio(m_pitchRatio, false);
     m_resetSampleRate = false;
 }
 
@@ -240,7 +241,7 @@ void AudioVoiceStereo::_resetSampleRate(double sampleRate)
     m_sampleRateIn = sampleRate;
     m_sampleRateOut = rateOut;
     soxr_set_input_fn(m_src, soxr_input_fn_t(SRCCallback), this, 0);
-    _setPitchRatio(m_pitchRatio);
+    _setPitchRatio(m_pitchRatio, false);
     m_resetSampleRate = false;
 }
 
diff --git a/lib/audiodev/AudioVoice.hpp b/lib/audiodev/AudioVoice.hpp
index 5ff0635..344c7ee 100644
--- a/lib/audiodev/AudioVoice.hpp
+++ b/lib/audiodev/AudioVoice.hpp
@@ -50,7 +50,8 @@ protected:
     /* Deferred pitch ratio set */
     bool m_setPitchRatio = false;
     double m_pitchRatio = 1.0;
-    void _setPitchRatio(double ratio);
+    bool m_slew = false;
+    void _setPitchRatio(double ratio, bool slew);
 
     /* Mid-pump update */
     void _midUpdate();
@@ -63,7 +64,7 @@ protected:
 public:
     ~AudioVoice();
     void resetSampleRate(double sampleRate);
-    void setPitchRatio(double ratio);
+    void setPitchRatio(double ratio, bool slew);
     void start();
     void stop();
     void unbindVoice();