Shrutibox.co.uk design M1 Shruti Boxes and supply them across the world. The family-run business was founded by Shruti player Stefan Cartwright in 2004 and is based in Stroud. The company works with a leading Indian instrument maker to create the professional-quality boxes which are available in two different tunings, C and Low G, and are easy to play. Historically the box instrument originated in India where it was developed from Western instruments such as the harmonium. It has now been developed further by Shrutibox.co.uk and is becoming popular on the folk scene with singers such as Sam Lee, as a portable drone instrument. The firm prides itself on trading fairly and minimising the environmental impact of manufacture and transport.