User Manual

HARDWARE INSTALLATION

Figure 5-12: Routing streams from your MOTU interface to the Mac.

☛ Leave Media Clock Input Stream set to None.

(This setting can be used to sync the Mac to

certain 3rd-party AVB devices that support Media

Clock. This setting is not needed for MOTU

devices.)

Clocking

In the example in Figure 5-12, the 1248 is the clock

master and the Mac is clocking to the 1248’s

Output Stream 1. You can also reverse this

scenario, where the Mac becomes the master and

the 1248 clocks to Mac’s Output Stream 1. The

Mac does not follow the web app’s Become Clock

Master button, so you must set the Mac’s Clock

Mode manually.

AVB stream and channel counts

Each AVB stream is a group of eight audio

channels. While testing is on-going, OS X AVB

performance varies with different Mac models.

Models such as the Mac Pro (late 2013) are able to

handle eight streams (64 channels) in and out

simultaneously, for MOTU interface models that

support eight streams. (Check

motu.com/proaudio for a summary of supported

stream counts for each MOTU interface model.)

For older Macs, we recommend one or two

streams in each direction. Generally speaking, it is

best to enable only as many streams as you need.