diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..dd6cf74
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 saturn-examples contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/Makefile b/Makefile
index 9397f81..18c5936 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ ALL += wordle/wordle.cue
 ALL += scsp/slot.cue
 ALL += scsp/sound_cpu__slot.cue
 ALL += scsp/sound_cpu__interrupt.cue
+ALL += scsp/sound_cpu__midi_debug.cue
 ALL += editor/main_saturn.cue
 
 all: $(ALL)
@@ -121,6 +122,8 @@ scsp/sound_cpu__slot.elf: scsp/sound_cpu__slot.o m68k/slot.bin.o
 
 scsp/sound_cpu__interrupt.elf: scsp/sound_cpu__interrupt.o m68k/interrupt.bin.o sh/lib1funcs.o res/sperrypc.font.bin.o common/draw_font.o common/palette.o
 
+scsp/sound_cpu__midi_debug.elf: scsp/sound_cpu__midi_debug.o m68k/midi_debug.bin.o sh/lib1funcs.o res/nec.bitmap.bin.o
+
 scsp/fm.elf: scsp/fm.o res/nec.bitmap.bin.o sh/lib1funcs.o saturn/start.o scsp/sine-44100-s16be-1ch-100sample.pcm.o
 
 scsp/sound_cpu__midi.elf: scsp/sound_cpu__midi.o m68k/midi.bin.o res/nec.bitmap.bin.o sh/lib1funcs.o saturn/start.o
@@ -145,7 +148,7 @@ clean-sh:
 		-not -path './saturn/*' \
 		-not -path './tools/*' \
 		-regextype posix-egrep \
-		-regex '.*\.(iso|o|bin|elf|cue)$$' \
+		-regex '.*\.(iso|o|bin|elf|cue|gch)$$' \
 		-exec rm {} \;
 	rm -f \
 		common/keyboard.cpp \