diff --git a/compact.sh b/compact.sh
new file mode 100755
index 0000000..44806e2
--- /dev/null
+++ b/compact.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+cd "$(dirname "$0")"
+
+CHAPTER="$1"
+
+if test -z "$CHAPTER" || test -f "audio/$CHAPTER.mp3"; then
+    echo "Usage: $0 <chapter>" >&2
+    exit 1
+fi
+
+sox part* output.wav
+ffmpeg -i output.wav audio/$CHAPTER.mp3
+
+if [ $? -eq 0 ]; then
+    rm output.wav part*.wav
+fi
+
+echo "Done"