diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e43b0f9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.DS_Store
diff --git a/bin/activate.sh b/bin/activate.sh
new file mode 100755
index 0000000..8624131
--- /dev/null
+++ b/bin/activate.sh
@@ -0,0 +1 @@
+source .venv/bin/activate
diff --git a/bin/run.sh b/bin/run.sh
new file mode 100755
index 0000000..0e287fe
--- /dev/null
+++ b/bin/run.sh
@@ -0,0 +1,2 @@
+source bin/activate.sh
+python -m tagger.run $*
diff --git a/bin/setup.sh b/bin/setup.sh
new file mode 100755
index 0000000..03ec6d9
--- /dev/null
+++ b/bin/setup.sh
@@ -0,0 +1,5 @@
+[[ -d .venv ]] && rm -rf .venv
+python -m venv .venv
+source .venv/bin/activate
+pip install --upgrade pip
+pip install -r requirements.txt
diff --git a/bin/test.sh b/bin/test.sh
new file mode 100755
index 0000000..30dd01e
--- /dev/null
+++ b/bin/test.sh
@@ -0,0 +1,2 @@
+source bin/activate.sh
+pytest tagger -vv $*
diff --git a/bin/watch_test.sh b/bin/watch_test.sh
new file mode 100755
index 0000000..16cd96b
--- /dev/null
+++ b/bin/watch_test.sh
@@ -0,0 +1,2 @@
+source bin/activate.sh
+watch -c "pytest -q --color=yes --tb=short tagger"
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..f6e1626
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+mutagen==1.47.0
diff --git a/sample/stardust.mp3 b/sample/stardust.mp3
new file mode 100644
index 0000000..c9e62e3
Binary files /dev/null and b/sample/stardust.mp3 differ
diff --git a/tagger/__init__.py b/tagger/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tagger/run.py b/tagger/run.py
new file mode 100644
index 0000000..a84e9ca
--- /dev/null
+++ b/tagger/run.py
@@ -0,0 +1,69 @@
+from mutagen import File
+from pathlib import Path
+
+import json
+import sys
+
+# Constants ########################################################################################
+
+KEYS = {
+    "GRID": "group-identification",
+    "GRP1": "itunes-group",
+    "MVIN": "itunes-movement-number-count",
+    "MVNM": "itunes-movement-name",
+    "OWNE": "ownership",
+    "PCNT": "play-count",
+    "PRIV": "private",
+    "TALB": "album",
+    "TBPM": "beats-per-minute",
+    "TCMP": "itunes-compilation-flag",
+    "TCOM": "composer",
+    "TCON": "content-type-genre",
+    "TCOP": "copyright",
+    "TDAT": "recording-date", # DDMM format
+    "TEXT": "lyricist",
+    "TIME": "recording-time", # HHMM format
+    "TIPL": "involved-people-list",
+    "TIT1": "content-group-description",
+    "TIT2": "title",
+    "TIT3": "subtitle",
+    "TMCL": "musicians-list",
+    "TMOO": "mood",
+    "TOWN": "owner",
+    "TPE1": "lead-artist-performer-soloist",
+    "TPE2": "band-orchestra-accompanist",
+    "TPE3": "conductor",
+    "TPE4": "iterpreter-remixer",
+    "TPOS": "part-of-set",
+    "TRCK": "track-number", # n/m format
+    "TSO2": "itunes-album-artist-sort-key",
+    "TSOA": "album-sort-key",
+    "TSOC": "itunes-composer-sort-key",
+    "TSOP": "performer-sort-key",
+    "TSOT": "title-sort-key",
+    "TXXX": "user-data",
+    "TYER": "recording-year",
+}
+
+# Script ###########################################################################################
+
+if __name__ == "__main__":
+    results:dict[str, dict[str,str|None]] = {}
+
+    sourcePath = Path(sys.argv[1])
+    for path in sorted(sourcePath.iterdir()):
+        file = File(path)
+        if not file: continue
+
+        pathText = str(path)
+        results[pathText] = {}
+
+        for code, key in KEYS.items():
+            if code in file:
+                results[pathText][key] = file[code].text
+            else:
+                results[pathText][key] = None
+
+    targetFile = sourcePath / "tags.json"
+    with targetFile.open("w") as file:
+        file.write(json.dumps(results, indent="    "))