In addition to my own products presented here under my logo, I also offer development work for companies. This can range from circuit and circuit board design to complete devices (functional units, assemblies, plug-in modules). My activities in this field are wide-ranging. In addition to work in the field of music and audio electronics, I am also interested in technology and research, industry and technical-scientific applications. My focus is on analogue circuit technology, measurement and data processing, control and regulation technology, and, of course, audio circuits with semiconductors and tubes.