Over the next few years, this interest led to the invention of Ambisonics, which can be seen as a theoretical and practical completion of the work done by Alan Blumlein in the field of stereophonic sound. Although Ambisonics was not a commercial success, its theory underpinned much of his later work in audio such as his work with Waves Audio and Trifield. He was also active in the development of digital sound techniques, such as noise-shaped dither and Meridian Lossless Packing (MLP, the lossless compression used in DVD-Audio disks).