Analog Recording; Operation Under Asio; General - RME Audio Fireface 400 User Manual

12.7 Analog Recording

For recordings via the analog inputs the corresponding record device has to be chosen (Fire-
face Analog (x+x)). Apart from the three reference levels, the Fireface has no means to change
the input level. This would make no sense for the digital inputs, but also for the analog inputs
one can do without it. It doesn't matter if the Fireface is operated at a mixing desk or a mul-
tichannel mic preamp, in either case the level can be controlled directly at the source to match
the Fireface's sensitivity perfectly.
The input sensitivity of the frontside analog inputs can be adjusted using the function INPUT
GAIN to match any external source perfectly, see chapter 27.2.

13. Operation under ASIO 2.0

13.1 General

Start the ASIO software and select ASIO Fireface as the audio I/O device. The 'ASIO system
control' button opens the Fireface's Settings dialog (see chapter 11 / 22, Configuration).
Fireface 400 supports
'ASIO Direct Monitoring'
(ADM). Please note that
at the time of writing this
manual, Nuendo,
Cubase and Logic either
do not support ADM
completely or not fully
error-free.
Using emulated MIDI
drivers can cause a drift
and delay between au-
dio and MIDI. Try the
non-emulated (MME)
MIDI ports in such a
case, or use an ad-
vanced setting like 'Sys-
tem Timestamp'.
When the sample frequency is set to 88.2 or 96 kHz, the number of ASIO ADAT channels is
reduced to 4. At a sample rate of 176.4 or 192 kHz (Quad Speed Mode) the ADAT I/O is no
longer available. Nevertheless it will send out a synchronized ADAT signal at a quarter of the
sample rate. The ASIO driver corrects the number of channels when changing from Single to
Double or Quad Speed. The channel routing of both ADAT ports is shown in chapter 18.1 and
37.5.
Some programs do not recognize the dynamic change of the number of ADAT channels, there-
fore do not operate correctly in Double and Quad Speed mode. A workaround is to use DDS.
After having set the desired sample rate, the ASIO software recognizes the correct number of
I/O channels directly when started.
User's Guide Fireface 400 © RME
29