http://www.mdbg.net/chindict/rsc/audio/voice_pinyin_cl/shi1.... (shī)

http://www.mdbg.net/chindict/rsc/audio/voice_pinyin_cl/shi2.... (shí)

http://www.mdbg.net/chindict/rsc/audio/voice_pinyin_cl/shi3.... (shǐ)

http://www.mdbg.net/chindict/rsc/audio/voice_pinyin_cl/shi4.... (shì)

For the falling-then-raising (shǐ) changing the "shi3" to "chi3" in the URL gives a better idea, I think, for what the inflection sounds like.