RME Audio Babyface Pro, Руководство пользователя

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User's Guide Babyface Pro © RME 87
31. Supported Inputs and Outputs
31.1 Class Compliant Mode
In Mac OS X, either the first two or all channels will work, depending on the choice in the Audio
MIDI Setup. The playback signal of channels 1/2 can be copied to outputs 3/4 and SPDIF/ADAT
by activating the
Copy Mode
(see chapter 32).
When connected to an iPad, the analog mic/line input 1 works with mono apps, inputs 1 and 2
with stereo apps (both dual mono and stereo), and up to 8 inputs with 8-channel applications
like
MultiTrack DAW
and
Music Studio
.
Garage Band
supports all 12 inputs, but only two at a
time.
Auria
and
Cubasis
can record all 12 inputs simultaneously.
Playback will use analog outputs 1 and 2, or even more channels if the app supports such op-
eration. The Babyface Pro onboard mixer can copy the output signal 1/2 to outputs 3/4, SPDIF
and ADAT simultaneously, see chapter 32 -
Copy Mode
.
In Class Compliant mode the default clock mode is AutoSync at 44.1 kHz. The Babyface Pro
(and with it the iPad) will be synchronized to an external digital sample rate if there is a valid
digital input signal. With a wrong sample rate heavy audio noise will occur. Without an SPDIF or
ADAT input signal the Babyface Pro enters master mode and uses the sample rate set by Mac
OS X or iOS (the app in use). The Babyface Pro can be set to fixed Master mode as well, but
the set sample rate is ignored, as the iPad (the current app) controls the sample rate value.
While the MIDI I/Os will send and receive Sysex messages, not all apps are ready to do this.
The app
Midi Tool Box
can be used to verify that the Babyface Pro is working correctly, and the
problem lies somewhere else.
31.2 Stand-Alone Mode
Switching on the unit without being connected to USB activates stand-alone mode, no matter if
the unit has been set to PC or CC mode before. In this mode the unit offers extensive configura-
tion options, like clocking and routing/mixing, that turn it into lots of useful, hi-quality tools. Ex-
amples are a 2 channel microphone preamp with analog and digital output, a headphone amp
with analog and digital inputs, and many more.
The clock modes are the same as in CC mode, but here the chosen sample rate is indeed used
by the unit. To recap what AutoSync means:
- Without further configuration and no digital input signal, it will default to 44.1 kHz internal sam-
ple rate.
- When receiving a digital input signal in SPDIF format, it will sync itself on the external sample
rate, from 32 kHz to 192 kHz.
- When receiving a digital input signal in ADAT format, it will sync itself on the external sample
rate, from 32 to 48 kHz. Double Speed mode is automatically set when receiving an ADAT sig-
nal from other RME devices. Otherwise the setting has to be performed manually (see next
chapter).
The input signals can be routed/mixed to the outputs by activating the unit’s
Mix mode
:
¾ Use
OUT
to select the desired output
¾ Use
IN
to select the input with the desired signal source
¾ Push
MIX
. The input LEDs start to flash.
¾
Use
SELECT
to choose between left, right or both input channels
¾ Turn the big knob to set the actual monitoring/routing level
¾ Continue with all inputs and outputs as you wish