Fix for No sound (Sound Blaster Audigy) after upgrading from Ubuntu 9.04 to 9.10
After upgrading from Ubuntu 9.04 to 9.10 you might not get the sound from your Sound Blaster Audigy sound card.
Install GNOME Alsa Mixer
sudo apt-get install gnome-alsamixer
Click on the following link
Now open GNOME ALSA Mixer from Applications -> Sound & Video -> GNOME ALSA Mixer
Choose the tab: "SigmaTel..."
Turn on "Audigy Analog/Digital Output Jack"
That's it now your sound should work as normal