problem with alsa installed

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http://askubuntu.com – i'm using linux for the first time. I installed alsa 12.0.25 in my system running ubuntu 12.04, after installing, i tried to play some files using command aplay -vv abc.wav, it started playing but cant hear the sound. I tried with the command cat /proc/asound/oss/ sndstat1, it was showing Sound Driver:3.8.1a-980706 (ALSA v1.0.24 emulation code) Kernel: Linux developer-OptiPlex-170L 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:41:14 UTC 2012 i686 Config options: 0 Installed drivers: Type 10: ALSA emulation Card config: Intel ICH5 with AD1980 at irq 17 Audio devices: NOT ENABLED IN CONFIG (HowTos)