Convert .aif files to .wav (#711)

* Migrate .aif files to .wav

* cleanup

tools/wav2agb/converter.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <string>
+#include <algorithm>
+#include <cstdint>
+
+enum class cmp_type {
+    none, dpcm
+};
+
+enum class out_type {
+    assembly, binary
+};
+
+void enable_dpcm_verbose();
+void enable_dpcm_lookahead_fast();
+void disable_dpcm_padding();
+void set_dpcm_lookahead(size_t lookahead);
+void set_wav_loop_start(uint32_t start);
+void set_wav_loop_end(uint32_t end);
+void set_wav_tune(double tune);
+void set_wav_key(uint8_t key);
+void set_wav_rate(uint32_t rate);
+
+void convert(const std::string&, const std::string&,
+        const std::string& sym, cmp_type ct, out_type ot);