diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 70d3dd0..9631a96 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -21,6 +21,10 @@ set(COMPONENT_SRCS "espd.c pdmain.c \
 ../pd/src/d_ugen.c \
 ../pd/src/d_resample.c \
 ../pd/src/d_soundfile.c \
+../pd/src/d_soundfile_wave.c \
+../pd/src/d_soundfile_aiff.c \
+../pd/src/d_soundfile_caf.c \
+../pd/src/d_soundfile_next.c \
 ../pd/src/d_global.c \
 ../pd/src/d_osc.c \
 ../pd/src/d_ctl.c \
@@ -50,7 +54,7 @@ set(COMPONENT_SRCS "espd.c pdmain.c \
 
 set(COMPONENT_ADD_INCLUDEDIRS ".")
 
-set(COMPONENT_ADD_CFLAGS "-DPD -DHAVE_UNISTD_H -DHAVE_ALLOCA_H \
-    -Wno-unused-variable")
+set(COMPONENT_ADD_CFLAGS "-DPD -DHAVE_UNISTD_H -DHAVE_ALLOCA_H -DPD_HEADLESS\
+    -DSYMTABHASHSIZE=512 -DSTUPID_SORT -Wno-unused-variable")
 
 register_component()
diff --git a/main/espd.c b/main/espd.c
index 36bd19c..448c682 100644
--- a/main/espd.c
+++ b/main/espd.c
@@ -76,7 +76,7 @@ void senddacs( void)
         ESP_LOGE(TAG, "error writing");
 }
 
-void pd_bt_writeback(const unsigned char *s, int length);
+void pd_bt_writeback(unsigned char *s, int length);
 
 void pdmain_print( const char *s)
 {
@@ -104,7 +104,6 @@ void app_main(void)
         .intr_alloc_flags = ESP_INTR_FLAG_LEVEL2,
     };
     i2s_pin_config_t i2s_pin_cfg = {0};
-    int zz = 0, ret;
 
     pdmain_init();
 
@@ -127,11 +126,14 @@ void app_main(void)
 
     while (1)
     {
-        /* if (!((zz++)%1000))
-        {
-            trymem(5);
-            ESP_LOGI(TAG, "tick");
-        } */
+        /*
+            int zz = 0;
+            if (!((zz++)%1000))
+            {
+                trymem(5);
+                ESP_LOGI(TAG, "tick");
+            }
+        */
         pdmain_tick();
         senddacs();
     }
@@ -144,7 +146,7 @@ void pd_bt_dispatch(char *data, size_t size);
 
 static uint32_t pd_bt_writehandle;
 
-void pd_bt_writeback(const unsigned char *s, int length)
+void pd_bt_writeback(unsigned char *s, int length)
 {
 #if 1
     if (pd_bt_writehandle)
diff --git a/main/pdmain.c b/main/pdmain.c
index dedc23b..dbff4b2 100644
--- a/main/pdmain.c
+++ b/main/pdmain.c
@@ -11,6 +11,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <ctype.h>
+#include <unistd.h>
 
 void pd_init(void);
 void glob_open(t_pd *ignore, t_symbol *name, t_symbol *dir, t_floatarg f);
@@ -319,6 +320,9 @@ void *canvas_undo_set_recreate(t_canvas *x,
     t_gobj *y, int old_pos) { return (0); }
 void canvas_noundo(t_canvas *x) {}
 void canvas_properties(t_canvas *x) {}
+void pd_undo_set_objectstate(t_canvas *canvas, t_pd *x, t_symbol *s,
+                                    int undo_argc, t_atom *undo_argv,
+                                    int redo_argc, t_atom *redo_argv) {}
 
 void glist_select(t_glist *x, t_gobj *y) {}
 void glist_deselect(t_glist *x, t_gobj *y) {}