This audio analyzer U8903B is intended to be able to perform highly accurate and many functional measurements in the audio area. This analyzer offers a very low residual distortion of <-110 dB. This can be used to characterize most applications in industry and in the recording studio. The analysis bandwidth extends up to 1.5 MHz, probably the highest bandwidth currently available in the audio range and can be carried out over 2 channels. An integrated test sequence memory enables the sequence of previously configured test sequences.