Asterisk Realtime Voice Pitch Changer

cd /usr/src

# download the stuff
wget http://ftp.digium.com/pub/asterisk/asterisk-1.2.0.tar.gz
wget http://www.hut.fi/u/oparviai/soundtouch_v1.3.0.zip
wget http://www.lobstertech.com/voicechanger/asterisk-1.2.0-voicechanger-0.2.patch
wget http://www.lobstertech.com/voicechanger/SoundTouch-1.3.0-C_FrontEnd-0.1.patch

# Apply patch to SoundTouch, build, and manually make a Shared Object
unzip soundtouch_v1.3.0.zip
cd SoundTouch-1.3.0
patch -p1 <../SoundTouch-1.3.0-C_FrontEnd-0.1.patch
./configure && make && make install
cd source/SoundTouch/
g++ -shared -fPIC -o libSoundTouch.so *.o
cp libSoundTouch.so /usr/lib

# Apply patch to Asterisk and build
cd /usr/src
tar -xzvf asterisk-1.2.0.tar.gz
cd asterisk-1.2.0
make clean
patch -p1 <../asterisk-1.2.0-voicechanger-0.2.patch
make && make install

[incoming]
; Call an outside line with deep voice
exten => _91NXXNXXXXXX,1,Set(CALLERID(all)=12034206660)
exten => _91NXXNXXXXXX,n,VoiceChangeDial(IAX2/my_trunk/${EXTEN:1}|-6.0|20|hr)
exten => _91NXXNXXXXXX,n,Hangup()

; and with high voice
exten => _81NXXNXXXXXX,1,Set(CALLERID(all)=12034206660)
exten => _81NXXNXXXXXX,n,VoiceChangeDial(IAX2/my_trunk/${EXTEN:1}|5.0|20|hr)
exten => _81NXXNXXXXXX,n,Hangup()