Soundmax integrated digital audio for windows 7 32 bit
More aboutsoundmax integrated digital audio windows
Sounds like you're after the audio driver for the onboard soundcard? If so, go to the motherboard manufacturer's website and search for the motherboard model number. You should then be able to download the audio drivers that will suit your soundcard.
I find that windows update provides a good generic Soundmax driver, especially for Asus based 865/875 P4 motherboards.