fix sampler makefile for autogen samples

assets/sound/Samples/Makefile

@@ -2,7 +2,8 @@ AS = arm-none-eabi-as
 AR = arm-none-eabi-ar
 
 BIN_FILES = $(sort $(wildcard BIN/*.bin))
-OBJ_FILES = $(addprefix OBJ/,$(notdir $(BIN_FILES:.bin=.o)))
+WAV_FILES = $(sort $(wildcard WAV/*.wav))
+OBJ_FILES = $(addprefix OBJ/,$(notdir $(BIN_FILES:.bin=.o))) $(addprefix OBJ/,$(notdir $(WAV_FILES:.wav=.o)))
 
 S_DUMP_FILES = $(sort $(wildcard S_DUMP/*.s))
 OBJ_DUMP_FILES = $(addprefix OBJ_DUMP/,$(notdir $(S_DUMP_FILES:.s=.o)))
@@ -15,8 +16,8 @@ clean:
 	rm -f OBJ/*.o OBJ_DUMP/*.o sample.a S/*.s
 
 #.PRECIOUS: S/%.s
-S/%.s: BIN/%.bin
-	bin2asm $< > $@
+S/%.s: WAV/%.wav
+	wav2agb $< $@
 
 OBJ/%.o: S/%.s
 	$(AS) $< -o $@