It's not as annoying as you may think.

[Michael Copeland]

Well the last I checked, clang was still busted on ppc32. YMMV.

I still don't think you're gonna get much use out of a ppc machine for any
form of effects unless you're just talking about using it as an equalizer.
For that matter, you could do almost all of it on the i386 laptop. Why do
you need to add in so many machines for this? For the record, you're not
going to get any form of realtime audio effects from that ppc machine,
unless you're running an old version of garage band from 10.5.8 on it, even
then it's not going to be quick. If you're hellbent on using a ppc machine,
get a ps3 for that purpose.