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If you are using just one external audio device (or an internal one such as a sound card)
everything is easy. This device becomes the clock master (usually automatically) and the
computer does what it has to do.
If you have more than one device, commonly a sound card and one or more external
audio thingies, life is more complicated. As before, you have to define one device as being
the clock master and must synchronize the others to it so that they all run at the same
sample rate. This is made more difficult by the fact that some devices (sound cards
especially) cannot accept synchronization and must be made the clock master, obliging the
other devices to be synchronized to them.
All audio devices used together in a system
MUST be synchronized to run at the same sample rate.
Synchronization is typically achieved by either hardware or software measures:
•
Hardware synchronization is achieved by connecting AES, S/P DIF or Wordclock
cables from the outputs of the clock master to a corresponding input of the other
devices and configuring these devices to use this signal as a sync source.
•
Software synchronization employs the use of sample rate conversion (which uses a
lot of computer power) to make disparate devices compatible with the master
sample rate. It is available on Macs when creating Aggregate Devices, or on some
Windows applications using WDM drivers. Again, see your computer manuals for
more details on these.
The FireWire link contains a sample clock to which the H8000FW can be synchronized if
all other approaches fail, but this is not recommended except as a last resort as the quality
of this clock is not high and it can increase jitter or other bad things. Note that on Macs
this is not always available.
So, to sum up:
•
One audio hardware device must be configured as the clock master
•
Any other audio devices in the system must be synchronized to the clock master by
(preferably) hardware or software means.
Summary of Contents for H8000FW
Page 6: ......
Page 140: ...134 Now the program has the new name new Voice ...
Page 183: ...177 Click Restart to restart your computer and conclude the installation ...
Page 186: ...180 The Sound options screen now displays ...
Page 195: ...189 ...