Metric Halo 2882 operating guide - Manual (Page 78)

Mobile I/O User’s Guide
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the driver. If your host allows you to select a buffer size, please make sure
that you choose one of the sizes that Mobile I/O supports (Digital Performer
is an example of a host that lets you set the size, but lets you set it to values
that are not valid).
If your host does not support setting the buffer size, it will generally use the
buffer size that the Mobile I/O driver recommends. The default buffer size for
Mobile I/O is 1024 samples per buffer.
The “Driver Options” dialog supported by most ASIO hosts provides a
popup menu to allow you to set the default buffer size reported by the
Mobile I/O driver to the ASIO host. Most hosts will take notice of a new set-
ting immediately, but some will not. If your host does not appear to notice
that the buffer size changed (e.g. the latency does not change), you will have
to select another ASIO driver and then switch back to the Mobile I/O driver
for the changes to take effect (Cubase VST is an example of a host that will
not notice the change automatically).
S AMPLE S IZE
The Mobile I/O ASIO driver provides the ASIO host with 24-bit samples. If
you record with a 16-bit session, there is no mechanism for the ASIO host to
inform the Mobile I/O driver that it wants 16-bit samples. It is the responsi-
bility of the host to dither the incoming audio to 16-bit samples before
recording them. If the host does not dither the samples to 16-bit, they will be
truncated by the host when they are recorded. For best recording quality, use
your host’s 24-bit recording option.
C LOCK S OURCES
The ASIO specification provides the capability for hosts to control the hard-
ware clock source. Some hosts provide a user interface to do this, others do
not. If the host does provide an interface to do this, you will be able to select
one of the Mobile I/O external clock sources directly from the host. If the
host does not provide an interface, you will need to use the MIO Console to
select the external clock source. If you have selected an external clock
source using either the host or the console, you will not be able to control
the system sample rate from the computer. MIO Console will automatically
reflect the clock source and sample rate set by the host.