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7. ULN-2 Users Guide
ULN-2 Overview
Figure 7.1: Mobile I/O ULN-2
What it is
ULN-2 is the result of a dream to create a piece of audio gear that provides unbelievable audio quality
while at the same time offering a degree of mobility and convenience that until very recently was simply not
possible. The successful integration of world-class analog stages, excellent A/D/A conversion, its amazing
digital mixing, routing, DSP and digital audio formats conversion with the dynamically expandable MHLink
platform makes the ULN-2 a uniquely flexible and powerful computer audio interface.
The ULN-2 is equipped with two balanced analog inputs on Neutrik™ combo connectors, two balanced
analog outputs (1/4" TRS)and two balanced monitor outputs for connecting directly to power amps and
self powered monitors. The digital side includes fully configurable ADAT® / TOSLINK optical I/O (with
full auto-SMUX support), BNC wordclock in/out plus independent stereo AES/EBU and S/PDIF Digital I/O
ports (provided on the base-configuration S/PDIF•AES EdgeBus card). Host computer connection and box
daisy-chaining are provided by two MHLink Gigabit Ethernet ports, each of which support 128 channels
of bidirectional audio at 192khz/32 bit data rate. A UAC2 class-compliant USB-C connection is available
as an alternative computer interface.
Analog inputs are capable of 24-bit/ 96kHz operation, although the analog outputs, digital i/o and internal
routing and processing paths support sample rates up to 192kHz.
What it has
• 12 simultaneous input channels and 14 simultaneous output channels
• A/D and D/A conversion at 44.1, 48, 88.2, 96kHz Sampling Rates (D/A conversion operates at 176.4
and 192kHz. A/D conversion is not supported at 4x sample rates.)
• 2 independent channels of high gain, low-noise mic-pre with switchable phantom power
• 24 bit 110 dB Dynamic Range A/D converters
• 24 bit 120 dB Dynamic Range D/A converters
• Digital I/O, DSP processing, routing and formats conversion at 44.1, 48, 88.2, 96, 176.4 and 192kHz
Sampling Rates
• 8 channels of ADAT® Optical Input and Output (or 2 TOSLINK). Optical inputs auto-sense ADAT®
vs. TOSLINK format. Optical output format is user-selectable. SMUX is automatically implemented
to support high sample rates.
• MH EdgeBus programmable and pluggable audio expansion slot.
ULN-2 base configuration includes the S/PDIF•AES Stereo Digital I/O EdgeCard pre-installed
