A digital audio software application developed by Digidesign in the late 1980′s. Sound Designer was originally created to be a sample-editing platform that interfaced with digital sampling instruments of the day. Not long after its introduction, Sound Designer became the front-end software for a direct to disk audio recording product called Sound Tools. The software became Sound Designer II at that time, and the Sound Designer II file format was born. While these old products have since been replaced by newer technology, the Sound Designer II file format lives on to this day. It is still one of the most popular audio file formats on the Macintosh, especially for professional audio work.