Realtime Analyzer Light is a sound measurement system that was first developed as a measurement tool in the area of construction acoustics. A key feature of the system is that it all but eliminates the need to carry extra test equipment. Accurate sound measurements can be performed without any additional special equipment except for a notebook computer. If more specialized measurement equipment such as a microphone or microphone amplifier are needed, these can be easily connected to the system to obtain the level of precision that is required. The system is endowed with the full range of measurement equipment functions, all adapted to stereo 2-channel operation so they can be used concurrently.