diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0253fe0..5d56766 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,6 @@ set(NAM_LV2_ID http://github.com/mikeoliphant/neural-amp-modeler-lv2)
 include_directories(SYSTEM deps/eigen)
 include_directories(SYSTEM deps/lv2/include)
 include_directories(SYSTEM deps/NeuralAmpModelerCore)
-include_directories(SYSTEM deps/AudioDSPTools)
 include_directories(SYSTEM deps/json)
 include_directories(SYSTEM deps/denormal)
 
diff --git a/deps/AudioDSPTools b/deps/AudioDSPTools
deleted file mode 160000
index 37f73d9..0000000
--- a/deps/AudioDSPTools
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 37f73d9ea6698b1b56c5a54fbdfa453a84fbd0b9
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1dbc5ad..6ca6c97 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -17,16 +17,10 @@ set(NAM_SOURCES	../deps/NeuralAmpModelerCore/NAM/activations.h
 	../deps/NeuralAmpModelerCore/NAM/convnet.cpp
 	../deps/NeuralAmpModelerCore/NAM/convnet.h)
 
-set(DSP_SOURCES	../deps/AudioDSPTools/dsp/dsp.h
-	../deps/AudioDSPTools/dsp/dsp.cpp
-	../deps/AudioDSPTools/dsp/RecursiveLinearFilter.h
-	../deps/AudioDSPTools/dsp/RecursiveLinearFilter.cpp)
-
-add_library(neural_amp_modeler MODULE ${SOURCES} ${NAM_SOURCES} ${DSP_SOURCES})
+add_library(neural_amp_modeler MODULE ${SOURCES} ${NAM_SOURCES})
 
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${SOURCES})
 source_group(NAM ${CMAKE_CURRENT_SOURCE_DIR} FILES ${NAM_SOURCES})
-source_group(dsp ${CMAKE_CURRENT_SOURCE_DIR} FILES ${DSP_SOURCES})
 
 option(DISABLE_DENORMALS "Disable floating point denormals" ON)
 
diff --git a/src/nam_plugin.cpp b/src/nam_plugin.cpp
index 7248b1c..5f524f7 100644
--- a/src/nam_plugin.cpp
+++ b/src/nam_plugin.cpp
@@ -24,10 +24,6 @@ namespace NAM {
 	{
 		this->sampleRate = sampleRate;
 
-		const double highPassCutoffFreq = 5.0;
-		const recursive_linear_filter::HighPassParams highPassParams(sampleRate, highPassCutoffFreq);
-		mHighPass.SetParams(highPassParams);
-
 		// for fetching initial options, can be null
 		LV2_Options_Option* options = nullptr;
 
@@ -251,8 +247,6 @@ namespace NAM {
 			}
 		}
 
-		float** outputPtrs = &ports.audio_out;
-
 		float modelLoudnessAdjustmentDB = 0;
 
 		if (currentModel != nullptr)
@@ -260,9 +254,6 @@ namespace NAM {
 			currentModel->process(ports.audio_out, ports.audio_out, n_samples);
 			currentModel->finalize_(n_samples);
 
-			// Apply a high pass filter at 5Hz to eliminate any DC offset
-			outputPtrs = mHighPass.Process(outputPtrs, 1, n_samples);
-
 			if (currentModel->HasLoudness())
 			{
 				// Normalize model to -18dB
@@ -282,7 +273,7 @@ namespace NAM {
 				// do very basic smoothing
 				level = (.99f * level) + (.01f * desiredOutputLevel);
 
-				ports.audio_out[i] = outputPtrs[0][i] * outputLevel;
+				ports.audio_out[i] = ports.audio_out[i] * outputLevel;
 			}
 
 			outputLevel = level;
@@ -293,9 +284,20 @@ namespace NAM {
 
 			for (unsigned int i = 0; i < n_samples; i++)
 			{
-				ports.audio_out[i] = outputPtrs[0][i] * level;
+				ports.audio_out[i] = ports.audio_out[i] * level;
 			}
 		}
+
+		for (unsigned int i = 0; i < n_samples; i++)
+		{
+			float dcInput = ports.audio_out[i];
+
+			// dc blocker
+			ports.audio_out[i] = ports.audio_out[i] - prevDCInput + 0.995 * prevDCOutput;
+
+			prevDCInput = dcInput;
+			prevDCOutput = ports.audio_out[i];
+		}
 	}
 
 	uint32_t Plugin::options_get(LV2_Handle, LV2_Options_Option*)
diff --git a/src/nam_plugin.h b/src/nam_plugin.h
index c22bd89..7bbefdf 100644
--- a/src/nam_plugin.h
+++ b/src/nam_plugin.h
@@ -22,7 +22,6 @@
 #include <lv2/units/units.h>
 
 #include <NAM/dsp.h>
-#include <dsp/RecursiveLinearFilter.h>
 
 #define PlUGIN_URI "http://github.com/mikeoliphant/neural-amp-modeler-lv2"
 #define MODEL_URI PlUGIN_URI "#model"
@@ -73,7 +72,8 @@ namespace NAM {
 
 		::DSP* currentModel = nullptr;
 		std::string currentModelPath;
-		recursive_linear_filter::HighPass mHighPass;
+		float prevDCInput = 0;
+		float prevDCOutput = 0;
 
 		Plugin();
 		~Plugin();