I did the G4/533 review, and I know this not a cheap solution but it may be
a common issue with the new 2001 G4 systems.
I have the G4/533 machine set up with a Digidesign 001 audio system with
ProTools LE 5.0.1, which includes a PCI card that interfaces to the external
A/D's and D/A's. It also comes with a driver to allow the external hardware
to be used as the Mac's sound output, that you choose in the Sound control
When you choose the Digidesign audio output, than all MacOS sounds, games
etc can come out of the external hardware, and you can run the ProTools
software and mix/edit no problem. If however you restart the computer with
the Digidesign hardware chosen in the Sound control panel, then only the
MacOS uses the external hardware, but the ProTools software gives an error,
stating that the hardware is busy or in use.
Setting the Sound control panel back to the Built-in option and restarting
allows the ProTools software to function again.
The point of this all is that in OS 9.1 (and in the 2001 G4 hardware likely)
there are differences in the way the audio is handled, and a new sound
driver is required to function normally. A ProTools 5.1LE upgrade will be
sent to registered users purchacing a 001 system on or after Sept. 1, 2000
that takes care of this issue. In fact as of now, the Digidesign site at www.digidesign.com/compato/maindigi001mac.html shows that the 001
system now ships with the Pro Tools 5.1LE software and is fully qualified on
the 2001 G4's single or dual CPU up to 533MHz so far with an updated list
when the 667MHz and 733MHz machines are released. Last week, the 2001 G4's
were not listed as being fully qualified, awaiting the new 5.1LE software
When I actually am able to download or receive the 5.1LE update I will let
you know how it works.
If you missed David's detailed review of the new G4/533 w/GeForce2MX card, see the G4 Macs section of the Systems page.