Our audio analysis multimeter combines audio tape quality measurement and analysis with multipurpose 6½-bit DMMs integrated, all in one half-rack instrument. They can measure total harmonic distortion (THD) within the audio band of 20 Hz to 20 kHz, as well as calculate THD + noise and signal-to-noise ratio (SINAD). The 2015P and 2016-P equipment can directly identify spectral peak values.