Lexicon CORE2, Service Manual

Page: 33 / 86

Lexicon
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Addendum #9: SELECTION OF WINDOWS SOUNDS
As a high-performance audio card, the Core2 is designed for use with
sample rates of 44.1 kHz and 48.0 kHz frequencies. Because most wave
files that are installed with the Windows operating system are
formatted at the 22 kHz or 11 kHz sampling rate, the Core2 may not play
such wave files in a desirable fashion. It is recommended that you
assign the PC's native sound card to the task of playing Windows
sounds by making it the "preferred" device in the Multimedia Control
Panel applet. In that way, there will be no conflicts while Windows
sounds are being played, even while you are using the Core2 in an
audio application.
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Addendum #10: CLOCK SOURCE SELECTION IN MMIO
After changing the clock source from the LexPanel, be sure to shut
down then re-start any applications that are using wave audio at the
time. This action will guarantee that the application correctly
recognizes the current clock source selection.
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Addendum #11: MMIO BUS ALIGNMENT IN ACID AND COOL EDIT PRO
It has been observed that occasionally the first output bus can be
out of alignment with the rest of the output buses in Acid and Cool
Edit Pro. This seems to be setting related: adjusting the number and
size of the audio playback buffers can help fix the problem. Another
work around is to put 2 dummy tracks at the top of your arrangement
and assign them to some outputs that you are not using.
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Addendum #12: NOISES THAT OCCUR AFTER SHUTDOWN OF SAMPLITUDE
It has been found that in order to release channels in SAMPLITUDE
for Lexpanel or other applications to use, the "Close all audio
devices" selection must be selected before quitting the
Samplitude audio application. If this is not done manually by you
prior to shutdown, an undesirable noise might result.
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Addendum #13: S/PDIF EFFECTS LOOP
It is possible to use the Core2 as the sample clock master in an
S/PDIF effects loop. In this configuration the Core2 S/PDIF output is
sent to external effects gear and output from this gear drives the
Core2 S/PDIF input. The Core is set to be the sample clock master for
the S/PDIF interface by selecting the internal oscillators or the ADAT
input. The external effects gear should be set to derive the sample
clock from the S/PDIF input or alternately from a sample clock source