bernard.xiong 1e67026b13 add sound device definition.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@334 bbd45198-f89e-11dd-88c7-29a3b14d5316
2010-01-25 00:01:27 +00:00
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2010-01-25 00:01:27 +00:00