diff --git a/Makefile b/Makefile
index 7b57192..5b73fda 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ OLEVEL = -O2
 
 CFLAGS = -Wall -std=c++17 $(OLEVEL) -o $(PROJ)
 
-OBJECTS = src/wtpp.cpp src/wave.cpp src/wavetable.cpp src/generators.cpp
+OBJECTS = src/wtpp.cpp src/wave.cpp src/wavetable.cpp src/generators.cpp src/common.cpp
 
 build:
 	$(CC) $(CFLAGS) $(OBJECTS)
diff --git a/src/common.cpp b/src/common.cpp
new file mode 100644
index 0000000..e000947
--- /dev/null
+++ b/src/common.cpp
@@ -0,0 +1,8 @@
+#include <string>
+#include <iostream>
+#include "common.h"
+
+void clog(std::string message)
+{
+  std::cout << "wtpp: " << message << '\n';
+}
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..b8eb0a0
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,27 @@
+/*! @file common.h
+    @brief Header for constants, types, utilities
+ */
+#ifndef COMMON_H_
+#define COMMON_H_
+
+#include <cstdint>
+#include <string>
+
+/*!
+    Constants
+ */
+const uint32_t DEFAULT_SAMPLE_RATE = 22050; /*!< 22.05 kHz sampling rate */
+const uint8_t DEFAULT_BIT_DEPTH = 12; /*!< 12bit samples */
+const uint16_t DEFAULT_N_SAMPLES = 1024; /*!< 1024 samples per wave cycle */
+const uint16_t DEFAULT_N_WAVES = 64; /*!< Number of Wave cycle objects in Wavetable */
+
+/*!
+    TYPES
+ */
+
+/*! Logs a message to console
+    @param message The string to be logged
+ */
+void clog(std::string message);
+
+#endif // COMMON_H_
diff --git a/src/generators.cpp b/src/generators.cpp
index 8470bea..efbd2c7 100644
--- a/src/generators.cpp
+++ b/src/generators.cpp
@@ -1,3 +1,4 @@
+#include <cmath>
 #include "generators.h"
 #include "wave.h"
 
diff --git a/src/generators.h b/src/generators.h
index 9e84223..c48cb1b 100644
--- a/src/generators.h
+++ b/src/generators.h
@@ -4,9 +4,6 @@
 #ifndef GENERATORS_H_
 #define GENERATORS_H_
 
-#include "math.h"
-#include <cstdint>
-
 #include "wave.h"
 
 /*! Generate sine wave data
diff --git a/src/wave.h b/src/wave.h
index ddcba66..7ec6ce9 100644
--- a/src/wave.h
+++ b/src/wave.h
@@ -4,18 +4,17 @@
 #ifndef WAVE_H_
 #define WAVE_H_
 
-#include <iostream>
+#include "common.h"
 #include <array>
+#include <cmath>
 #include <cstdint>
+#include <iostream>
+#include <string>
 
-#include <math.h>
-
-const uint16_t DEFAULT_N_SAMPLES = 1024;
-
-using sample_table_t = std::array<float_t, DEFAULT_N_SAMPLES>;
+using sample_table_t = std::array<float_t, DEFAULT_N_SAMPLES>; /*!< Array of waveform sample data*/
 
 /*! @class Wave wave.h "wave.h"
-  @brief Single cycle wave object with lookup table
+    @brief Single cycle wave object with lookup table
  */
 class Wave
 {
diff --git a/src/wavetable.h b/src/wavetable.h
index 6acd1f8..3eefe27 100644
--- a/src/wavetable.h
+++ b/src/wavetable.h
@@ -10,10 +10,7 @@
 
 #include "wave.h"
 
-/* Number of Wave cycle objects in table */
-const uint16_t DEFAULT_N_WAVES = 256;
-
-using wave_table_t = std::array<Wave, DEFAULT_N_WAVES>;
+using wave_table_t = std::array<Wave, DEFAULT_N_WAVES>; /*!< Array of Wave objects */
 
 /*! @class Wavetable wavetable.h "wavetable.h"
     @brief Object containing a table of single cycle Wave objects
diff --git a/src/wtpp.cpp b/src/wtpp.cpp
index e00d1b2..a1534ab 100644
--- a/src/wtpp.cpp
+++ b/src/wtpp.cpp
@@ -1,30 +1,19 @@
 #include <array>
-#include <cmath>
 #include <cstdint>
-#include <iostream>
-#include <string>
 #include <type_traits>
 
 #include <math.h>
 
+#include "ini.h"
+
+#include "common.h"
 #include "wave.h"
 #include "generators.h"
 #include "wavetable.h"
 
-static const uint32_t DEFAULT_SAMPLE_RATE = 44100; // 44.1 kHz sampling rate
-static const uint8_t DEFAULT_BIT_DEPTH = 12;
-
-/*! Logs a message
-    @param message The string to be logged
- */
-static void log(std::string message)
-{
-  std::cout << "wtpp: " << message << '\n';
-}
-
 int main()
 {
-  log("Generating wave cycle lookup tables");
+  clog("Generating wave cycle lookup tables");
   Wave sin_wave, squ_wave, saw_wave, tri_wave, isaw_wave;
 
   // Calculate fundamental wave values
@@ -41,21 +30,21 @@ int main()
   tri_wave.setTable(tri_vals);
   isaw_wave.setTable(isaw_vals);
 
-  log("Printing head of sine table");
+  clog("Printing head of sine table");
   sin_wave.print_head();
-  log("Printing head of square table");
+  clog("Printing head of square table");
   squ_wave.print_head();
-  log("Printing head of saw table");
+  clog("Printing head of saw table");
   saw_wave.print_head();
-  log("Printing head of triangle table");
+  clog("Printing head of triangle table");
   tri_wave.print_head();
-  log("Printing head of inverse saw table");
+  clog("Printing head of inverse saw table");
   isaw_wave.print_head();
 
   // Create wave table of all fundamental Wave objects
   wave_table_t fundies = {sin_wave, squ_wave, saw_wave, tri_wave, isaw_wave};
   Wavetable wt_01{"Fundamental Waves", fundies};
-  log(wt_01.name());
+  clog(wt_01.name());
 
   // Write sine wave table to file
   sin_wave.export_csv("data/sine.csv");