Back in Audio Amateur issue 1 of 1980 David M. White Jr. published a very worthwhile system tool project, titled A Dynamic Range and Clipping Indicator. With a full instruction set including PCB layout, parts list, and a detailed schematic, this design uses an LED array for display of dynamic signal peaks.
Dave recently upgraded the original hardware, as part of a complete system restoration. He has retired to a new home, and is now busy on the listening room and upgrading his home-built electrostatic arrays along with the associated complex crossover and drivers. As for the Clipping Indicator, he has indicated that all parts are still available, but today’s modern LEDs should provide longer lifetimes than did the old parts. Thanks for sharing a useful design with us once again, Dave!