ULN-2 Users Guide
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What‘s the difference between the Analog outs and Monitor outs, and how do I send to
the headphones?
• The Analog outputs get their signal from “Analog 1/2” in MIOConsole3d, and their level
is controlled via software
• The Monitor outputs and headphones get their signal from “Monitor L/R” in
MIOConsole3d, and their output levels are controlled via the front panel knobs
There are seven classes of connections you can make to the ULN-2 3d hardware:
1. Gigabit Ethernet (MHLink)
2. USB
3. Analog Audio
4. Copper-based Digital Audio
5. Optical-based Digital Audio
6. Clock Sync
7. Power
Computer Connections
•
MHLink (Gigabit Ethernet)
- The preferred method of connecting your computer to the ULN-2 (or
any Metric Halo 3d audio device) is with a Gigabit Ethernet cable to one of the MHLink ports. This
method enables the full capabilities of the 3d/MHLink environment with 128 channels at 32bit integer
resolution input and output at all sample rates up to 192kHz. Daisy-chaining additional MHLink box-
es dynamically and transparently integrates the new devices into the currently-running Console3d
mixer, making all the added I/O ports and DSP engine power immediately available for use.
MHLink requires the installation of the MHLinkDriver software. The latest MIOConsole3d installer
package is available from:
(this will require a restart). Please see
Driver Installation on macOS 10.13 and newer
With High Sierra (macOS 10.13) Apple introduced another layer of driver (system exten-
sion) software security.
In order for third-party drivers (system extensions) to be activated on new installs of High
Sierra, the user of the computer (you) must explicitly approve the activation, after the
installation has occurred.
You must do this before you will be able to use your hardware via MHLink.
The authorization process is the same for all third-party drivers. If you are unfamiliar with
the process, please read our FAQ answer here:
macOS Driver User Authentication
Note:
With MHLink, you need to launch MIOConsole3d to establish the routing between MHLink and
the attached box(es). The routing is established automatically as soon as you launch MIOConsole3d.