Add ul2algsm script to convert ulaw to alaw and GSM formats.

.gitignore

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+*.wav
+*.gsm
+*.alaw

ul2algsm.sh

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+#!/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