User's Guide
DIGI32 PRO © RME
7
The picture to the right
shows the smallest buf-
fer setting for a crackle-
free 24 bit operation in a
computer with 200 MHz.
More or larger buffers
produce an even higher
defence against distur-
bance, but also cause a
longer delay in playing
back the data. In case of
synchronized audio to
MIDI playback be sure to
activate the checkbox
'Get play position from
audio driver' when
available in your pro-
gram. Because the
DIGI32 PRO
re-
ports the actual play
position correct (even in
record where this is nec-
cessary for chase lock sync) there will be no sync problems when working in a mixed audio/MIDI
environment even with higher buffer settings.
8.3 Record
After the
DIGI32 PRO
has been set up as recording device in the software being used at
the time, there are a few further points to note. Because the operating system cannot define
errors exactly, it may well be that you receive the same error message for very different types of
problems.
As opposed to soundcards which produce empty wave files (just noise) even without an input
signal, digital in/out cards must have a valid input signal to begin recording. The correct sample
frequency is also important. There is no valid input signal available when a DAT plays back a
tape which has been recorded at 48 kHz, and the recording software is set at 44,1 kHz.
Because of this peculiarity RME has given the
DIGI32 PRO
two unique features: an Error
LED for the active input in use and a visual display of the actual sample frequency. The Error
LED indicates wether a valid input signal is present. Whenever an error occurs (wrong input,
invalid data, signal delivering device delivers nothing) the LED will light red. As soon as a valid
input signal is present this light will go off.
The display of the sample frequency (see chapter 9, picture Properties) in the Device Manager
offers a similar function. If none of the standard frequencies like 32 kHz, 44,1 kHz or 96 kHz
come up then ‘Out Of Range’ will appear, and by an error detection ‘No Lock’.
Therefore configurating the software to perform a digital recording is child´s play. After choosing
the correct input
DIGI32 PRO
will show the actual sample frequency. You can now enter
this information into the corresponding dialog box of the recording program.
Additional
DIGI32 PRO
includes a safety function that checks the sample frequency. For
example feeding a signal with 48 kHz and trying to record with 44,1 kHz is not allowed. Otherwi-
se recordings with a wrong pitch would be the result.