diff --git a/neotools/.gitignore b/neotools/.gitignore
index d68123b..144b82f 100644
--- a/neotools/.gitignore
+++ b/neotools/.gitignore
@@ -5,7 +5,10 @@
 *.pcm
 *.wav
 
+*.obj_*/
 *.o
+*.d
+CMakeLists.txt
 adpcm
 adpcmb
 neoadpcmextract
diff --git a/neotools/neoadpcmextract.Makefile b/neotools/neoadpcmextract.Makefile
index e6fe428..1249ee1 100644
--- a/neotools/neoadpcmextract.Makefile
+++ b/neotools/neoadpcmextract.Makefile
@@ -4,7 +4,8 @@ CFLAGS := -std=c99 -O2 -pipe -Wall -Wextra -pedantic
 LDFLAGS := $(CFLAGS)
 
 
-OBJECT := $(SOURCE:%.c=%.o)
+OBJDIR := .obj_$(TARGET)
+OBJECT := $(patsubst %.c, $(OBJDIR)/%.o, $(SOURCE))
 DEPEND := $(OBJECT:%.o=%.d)
 
 .PHONY: default all clean
@@ -14,10 +15,13 @@ all: $(TARGET)
 $(TARGET): $(OBJECT)
 	$(CC) $(LDFLAGS) $^ -o $@
 
-%.o: %.c
+$(OBJDIR):
+	mkdir -p $@
+
+$(OBJDIR)/%.o: %.c | $(OBJDIR)
 	$(CC) $(CFLAGS) -MMD -c $< -o $@
 
 -include: $(DEPEND)
 
 clean:
-	rm -f $(TARGET) $(OBJECT) $(DEPEND)
+	rm -rf $(OBJDIR)
diff --git a/neotools/neoadpcmextract.h b/neotools/neoadpcmextract.h
new file mode 100644
index 0000000..b55222f
--- /dev/null
+++ b/neotools/neoadpcmextract.h
@@ -0,0 +1,8 @@
+#ifndef __NEOADPCMEXTRACT_H__
+#define __NEOADPCMEXTRACT_H__
+
+#include <stdio.h>
+
+int vgmExtractSamples(FILE* file);
+
+#endif//__NEOADPCMEXTRACT_H__