... and 160dB/Octave digital filter for each channel to eliminate non-linear phase distortion and image Resolution 24-bit DA converter ( ... , Flattop, Uniform, Bartlett, Tukey, Blackman, Blackman Maximum, BlackmanMinimum, Welch Linear, exponential, peak hold, peak hold for N frame on both ... bands: 20Hz~16kHz /1/3 octave bands: 20Hz~20kHz Weighting Linear, A, B, C selectable Sound level types Peak hold, ...