diff --git a/sdrbase/dsp/dspengine.cpp b/sdrbase/dsp/dspengine.cpp
index 3286235b5..fa99246b9 100644
--- a/sdrbase/dsp/dspengine.cpp
+++ b/sdrbase/dsp/dspengine.cpp
@@ -113,17 +113,6 @@ void DSPEngine::stopAudioInput()
     m_audioInput.stop();
 }
 
-void DSPEngine::startAudioInputImmediate()
-{
-    m_audioInput.startImmediate(m_audioInputDeviceIndex, m_audioInputSampleRate);
-    m_audioInputSampleRate = m_audioInput.getRate(); // update with actual rate
-}
-
-void DSPEngine::stopAudioInputImmediate()
-{
-    m_audioInput.stopImmediate();
-}
-
 void DSPEngine::addAudioSink(AudioFifo* audioFifo)
 {
 	qDebug("DSPEngine::addAudioSink");
diff --git a/sdrbase/dsp/dspengine.h b/sdrbase/dsp/dspengine.h
index 31ff1fff0..629afc9f2 100644
--- a/sdrbase/dsp/dspengine.h
+++ b/sdrbase/dsp/dspengine.h
@@ -56,8 +56,6 @@ public:
 
     void startAudioInput();
     void stopAudioInput();
-    void startAudioInputImmediate();
-    void stopAudioInputImmediate();
     void setAudioInputVolume(float volume) { m_audioInput.setVolume(volume); }
     void setAudioInputDeviceIndex(int index) { m_audioInputDeviceIndex = index; }