diff --git a/Source/Filters/soap.cpp b/Source/Filters/soap.cpp
index 65f7a814..ea95289c 100644
--- a/Source/Filters/soap.cpp
+++ b/Source/Filters/soap.cpp
@@ -3,6 +3,8 @@
 
 #define PI 3.141592653589793
 
+using namespace daisysp;
+
 void Soap::Init(float sample_rate)
 {
     soap_center_freq_ = 400.0;
diff --git a/Source/Filters/soap.h b/Source/Filters/soap.h
index 1f72cbcf..4fdd3414 100644
--- a/Source/Filters/soap.h
+++ b/Source/Filters/soap.h
@@ -1,5 +1,7 @@
 #pragma once
 
+namespace daisysp
+{
 /** Second Order All Pass Filter
 
 This is from Tom Erbe's synth notes. The filter
@@ -18,18 +20,18 @@ class Soap
         */
     void Init(float sample_rate);
 
-    /** 
+    /**
             Process the input signal, updating all of the outputs
         */
     void Process(float in);
 
-    /** 
-            Sets the center frequency of the filter. 
+    /**
+            Sets the center frequency of the filter.
         */
     void SetCenterFreq(float f);
 
-    /** 
-            Sets the low frequency threshold of the filter. 
+    /**
+            Sets the low frequency threshold of the filter.
         */
     void SetFilterBandwidth(float b);
 
@@ -55,4 +57,6 @@ class Soap
     float out_bandpass_;
     float out_bandreject_;
     float sr_;
-};
\ No newline at end of file
+};
+
+} // namespace daisysp