Jack.Wang,
Have you tried updating the firmware? For your particular model, the instructions and firmware are available at this link, and do address an audio issue:
http://www.samsung.com/us/support/download/supportDown.do?group=televisions&type=televisions&subtype=lcdtv&model_nm=LN37A330J1D&language=&cate_type=all&dType=D&mType=FM&vType=L&prd_ia_cd=02010100&disp_nm=LN37A330
Keep me posted!
--HDTech
Does anyone experience an audio dropout in LN37A330? any solutions? THX a million.

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