Thank you Jennifer and Karen! It seems we may have located the "What's That Sound" game. It looks as if the name and packaging have been changed. It is now called "Soundtracks" and is on the School Specialty Publishing website. Here is the link: http://www.schoolspecialtypublishing.com/store/item.aspx?itemid=2680
I also found it on the Target and Amazon website, but it appeared to be much cheaper in School Specialty.