diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..61cf8b2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.wav
+*.gsm
+*.alaw
diff --git a/ul2algsm.sh b/ul2algsm.sh
new file mode 100755
index 0000000..c0e3ab4
--- /dev/null
+++ b/ul2algsm.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+#
+# Script to convert ulaw files to alaw and gsm using sox.
+#
+
+for i in $( find ./ -name "*.ulaw" -printf '%P\n' ); do
+    filename="${i%.*}"
+    echo converting: $filename
+    sox -t ul -r 8000 -c1 $filename.ulaw -e a-law $filename.al
+    mv $filename.al $filename.alaw
+    sox -t ul -r 8000 -c1 $filename.ulaw $filename.gsm
+done