Avid Pro Tools MTRX 8 Line Pristine AD Card (Input)Add eight channels of line level analog inputs for connecting preamps, keyboards, signal processors, mixers, and other gear. Specifications Analog Inputs: 8 Line level Input gain: Adjustable from 18 to +70 dB, in steps of 0. 1 dB, + 0. 25 dB accuracy Max input level: Adjustable from 9 dBu to 30 dBu in steps of 0. 1 dB Sampling, resolution: 5 bit sigma delta @ 5. 645 or 6. 144 MHz, 24 bit PCM DSD sample rates: 2. 8224 and 5. 6448 Mhz (64 and 128 fs)