What codecs and from where did you install? Are you (as user) in the audio group
As jdkaye said, it would be helpful to know if you had sound before the installation of codecs.
You could post the output from few commands in Konsole as root;
1. rpm -qa '*alsa*'
2. rpm -qa '*pulse*'
3. hwinfo --sound
It's always good to check if your sound is muted in Mixer.