Convert .aif files to .wav (#711)

* Migrate .aif files to .wav

* cleanup

tools/wav2agb/Makefile

@@ -0,0 +1,33 @@
+GIT_VERSION := $(shell git describe --abbrev=7 --dirty --always --tags)
+
+CXX = g++
+STRIP = strip
+CXXFLAGS = -Wall -Wextra -Wconversion -std=c++17 -O2 -g -DGIT_VERSION=\"$(GIT_VERSION)\"
+EXE :=
+ifeq ($(OS),Windows_NT)
+  EXE := .exe
+endif
+BINARY = wav2agb$(EXE)
+
+SRC_FILES = $(wildcard *.cpp)
+OBJ_FILES = $(SRC_FILES:.cpp=.o)
+
+LDFLAGS :=
+
+ifneq (,$(RELEASE))
+  LDFLAGS += -static
+  CXXFLAGS += -flto
+endif
+
+.PHONY: clean clean
+all: $(BINARY)
+
+clean:
+	rm -f $(OBJ_FILES) $(BINARY)
+
+$(BINARY): $(OBJ_FILES)
+	$(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^
+	if [ $(RELEASE)x != x ]; then strip -s $@; fi
+
+%.o: %.cpp
+	$(CXX) -c -o $@ $< $(CXXFLAGS)