Metric Halo 2882 operating guide - Manual (Page 98)

Mobile I/O User’s Guide
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D IGITAL G RUNGE
It is possible for the ASIO driver to fall out of sync with the hardware. This is
an unlikely occurrence and Metric Halo is actively investigating the root
cause. It appears to affect some hosts more than others and is more likely to
happen if the system is heavily loaded. If it does happen, the audio being
transpoerted will have an aliased, bit-crusher quality of digital distortion to
it. You will need to reset the driver to fix this problem. Each host has a differ-
ent approach to resetting the driver – check your host’s documentation for
details.
F IRMWARE U PDATE P ROBLEMS
For details on updating the firmware of Mobile I/O refer to Appendix 1.
It is possible for firmware updates to “not take”. This appears to be related to
DSP loading issues in the Mobile I/O, other devices on the FireWire bus, and
the state of the FireWire system software on the Mac. If you have problems
with updating the firmware, try the following procedure:
1. Remove all devices from the FireWire bus
2. If your Mobile I/O is using external power, disconnect the power
3. Reboot your computer
4. Attach the external power supply to the Mobile I/O while holding
down the front panel Mute button; this will boot the Mobile I/O
into the safety boot firmware
5. Connect the Mobile I/O to your computer
6. Run the firmware updater (MIOBootInstaller at this writing)
Since Mobile I/O implements safe-boot and safe firmware update, you
should always be able to use this procedure to update the firmware, even if
something goes horribly wrong (like losing power during an update).
B US P OWERING M OBILE I/O
If you are bus powering the Mobile I/O, there is a possibility that you have
overloaded the power rating of the power source.
N OT ENOUGH POWER ON THE BUS
While all Macintosh computers with built-in FireWire supply bus power,
some models do not provide enough power on the bus to power Mobile I/O.