The other videos go over how the Surface Music Kit can import new sounds to use in projects, along with the ability to create new sounds and music and adding sound effects via the accessory"s sliders. Finally it shows how it can export tracks as MP3, WAV or WMA files to share with others.
While we are still waiting to see when Microsoft will actually release the Surface Music Kit, the company is still accepting entries in its contest that asks people to Tweet how they would use the product. Microsoft will announce the winners on October 28th, who will then receive their own Music Kit.
Source: Surface on YouTube