YH must be so sleepy now 
If you have strictly follow my scripts, you should have found that Speex codec has been included.
# Codec Translators > codec_speex
cd /usr/src/asterisk-complete
wget http://downloads.xiph.org/releases/speex/speex-1.2rc1.tar.gz
tar xvzf speex-1.2rc1.tar.gz
cd speex-1.2rc1
./configure && make && make install |