Answer these alsa troubleshooting questions, please.
After you finish answering the questions then re-submit this page to pastebin.ca
and post the new url for this troubleshooting page to #alsa.

Is your PC a laptop or Notebook PC?
Answer yes or no, answer no if your PC is a Desktop PC.
Enter your answer here: yes

Is your installed linux distribution a 64bit install?
Answer yes or no, answer no if you do not know what a 64bit install is.
Enter your answer here: no

Is a Surround Sound Speaker System plugged into your sound card?
Answer yes or no, answer no if you do not know what a surround sound speaker system is.
Enter your answer here: no

Have you tried any model options when loading starting alsa?
Answer yes or no, answer no if you do not know what model options are.
Enter your answer here: yes

Enter your make and model number for your laptop, desktop or motherboard? [example: aces p9m99-m9].                                  
Answer no if you do not know what your make and model number is.
Enter your answer here: sony vaio sz660nc

What is the total number of jacks that can be plugged into your soundcard? [examples: 0,1,2,3,5,6]
This jpg photo explains what a jack is: http://home.cfl.rr.com/infofiles/soundcard2.jpg
Enter your answer here: 2

Number of speakers connected to the sound card? [examples: 0,1,2,6,8,10]
Enter your answer here: 2

Are your sound card's speakers powered by a digital receiver?
Answer yes or no, answer no if you do not know what a digital receiver is.                                  
Enter your answer here: no

Describe your sound problem:
Enter you sound problem here: I can't hear the sound from the microphone or the external input, but I can record them.

If pastebin.ca is done then run this command:
wget -O alsa.question http://nopaste.com/p/ao78k7dUG/txt
Answer the questions by editing alsa.questions in the directory you downloaded it into.
Then upload the edited alsa.questions file with this command:
curl -F file=@~/$USER/alsa.questionsfilename nopaste.com/a
curl prints a URL when it uploads the file, post the URL in #alsa