User manual

8X96 ADC and DAC User Manual Page 49 of 54
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Prism MRX ™ encoder and decoder
Mytek has acquired a license for use of the MRX ™ bitsplitting method, developed by
Prism of U.K. and used in their popular MR2024T interface.
MRX bitsplitting is intended to pack higher resolution signals onto 8 channels of Tascam
16 bit DA88 and DA38 machines. The following formats are possible:
MODE1 - 4 channels of 24 bit @44/48k are packed onto 8 tracks of 16 bit.
MODE2 - 6 channels of 20 bit @44/48k are packed onto 8 tracks of 16 bit.
MODE1-96 - 2 channels of 24 bit @88/96k are packed onto 8 tracks of 16 bit.
MODE2-96 - 3 channels of 20 bit @88/96k are packed onto 8 tracks of 16 bit.
MODE*-96 is engaged automatically whenever 2X sampling switch is on. For additional
details see “Dip switch options”.
The MR2024T also encodes a special control signal that can be detected in order to
determine whether mode 1 or 2 was used.
TDIF card can both encode and decode MRX signals.
It’s recommended that one use the MRX™ with 16 bit machines only, unless you are
making a 24 bit stereo master. If you own 20 bit ADAT, a 24 bit signal noise shaped to
20 bit will practically produce the same results, with no future problems decoding the
tapes. Similarly a 20 bit ADAT can be used as 4 channel 20 bit/96k machine with
absolutely stellar results (see S/MUX).
If you are overdubbing and punching-in, do not use MODE2 of MRX as it cannot
produce smooth crossfades. In MODE1 punch-in is possible , but double-check the
quality of the crossfades when recording audiophile quality acoustic music.