Audio monitoring has, as would be expected, changed dramatically since the days of mono sound and peak program and volume unit meters (PPM/VU), but development is now continuing at a rapid rate. Manufacturers have responded to how the broadcast market has broadened, with streaming and distribution to multiple platforms and devices bringing a whole new set of parameters to be monitored.
These include the various forms of multichannel audio—surround or, increasingly, immersive sound being the most obvious forms but with alternative languages and commentaries plus audio description now ever more important—along with audio over IP (AoIP) formats.
