sound disabled after sleep mode (closing laptop)

Hello,

It happens to me on the previous OSX Mountain Lion and also with Mavericks. Everytime i was listing to music or watching movies, anything with sound and i close my laptop by folding down the screen (while the sound is playing). After i login again the sound suddenly stop to play, like its muted but isnt. Anyone knows how to fix this issues?

thanks in advance

btw my english isnt my primary language.