RAE is the advanced sound analyzer with the latest environmental noise measurement technology. It is a functional limited edition of the advanced acoustic research system DSSF3 prepared to offer its latest functions at a reasonable price. RAL + Impulse response, Running ACF, Noise measurement. The point that RAE differs completely from other systems is that a time change of sound can be analyzed in detail at a high temporal resolution. Broad examples of measurement are considered, such as a measurement in a concert hall, measurement of a home audio and car audio, tuning of a musical instrument, aircraft noise measurement, traffic noise measurement, analysis of toilet noise, musical instrument music analysis, voice analysis, performance measurement of a motor, measurement of the operation sound of an air-conditioner, and heartbeat measurement.