Steinberg UR28M - Introduction; Class Compliant mode; Loopback function

Introduction
UR28M Operation Manual 4
Class Compliant mode
In Class Compliant mode, the UR28M works with the
iPad through the Apple iPad Camera Connection
Kit. It can be used with iOS compatible music
production applications such as Steinberg Cubasis
for convenient high-quality recording anywhere, at
any time. A computer can also be used in CC mode.
Loopback function
Loopback function facilitates video delivery and
other Internet related activities. This function mixes
the input audio signals (LINE, Guitar, Mic, etc) and
the audio signals playing back in the software into
two channels in the UR28M, and back to the
computer for live broadcasting via the Internet.
BGM Delivery
UR28M DSP Mixer