Claus Trelby is an Emmy-nominated Engineer, Producer, Chief Engineer, and Director of Technology with more than 30 years of experience working with legendary artists including Joni Mitchell, Eric Clapton, Sting, Herbie Hancock, Peter Frampton, and Christine McVie. As Chief Engineer of Marshmellow Skies, he is at the forefront of immersive audio, mixing iconic catalogs and contemporary artists in Dolby Atmos. Alongside Ken Caillat, Claus mixed five Joni Mitchell albums in Atmos, including the 2024 Grammy-winning Joni Mitchell at Newport. A leading spatial-audio consultant, he also contributes to the development and global implementation of Eclipsa Audio, providing technical expertise to industry leaders including Google and Samsung while advancing immersive sound without compromising artistic intent.