I recently got really frustrated with the fact that some of my favourite plug-ins are not
Universal Binaries, and won't run in Logic 7. So I started to experiment. Here is what
you need for making older PPC software instruments usable in Logic 7:
Your sequencer (all my comments relate to Logic Pro 7, but other sequencers might work as
2: Rax ($49.95) http://plasq.com/rax
3: MidiPipe (free) http://www.versiontracker.com/dyn/moreinfo/mac/16154
Before you continue, quit all applications, except for your browser.
Download and install Rax. However, rather than starting it, open the "Get Info" window
for Rax, and check the box "Opening using Rosetta".
Start Rax, and bring up your
favourite AU instruments in the field at the bottom. To the right, you can set their midi
channels. For now, set the first instrument to channel 5 (you can change this later if
you want). Make sure the two buttons to the right are green and red in colour,
respectively. Also, the large button in the top bar, to the right, needs to be green.
Open Rax Preferences. Set your preferred audio output. The sample rate is determined
by your settings in "Audio MIDI Setup", and should match the one you are using in
Still in Rax preferences, click on "MIDI" and leave all boxes unchecked.
However, enable "Block duplicate note messages".
Download and install
MidiPipe. Start MidiPipe. Double-click on "Midi In" in the left box of the main window,
then double-click on " · Midi In" in the right box. In the new window, set Midi Input to
"MidiPipe Input 1". Leave "hijack" disabled.
Double-click on "Midi Out" in the
left box of the main window, then double-click on " · Midi Out" in the right box. In the
new window, set Midi Output to "Rax 1". Leave "Pass Through" enabled.
you can start Logic.
In Logic's environment, you will find MidiPipe listed as
a new midi port. Create a new instrument for your first Rax AU instrument, and set it to
the port "MidiPipe Input 1". Set the instrument midi channel to "5". Done!
You should now be able to play and record all Rax midi actions from within Logic. You
can create additional AU instruments in Rax and Logic, but remember to give them matching
One note of caution: When I started to experiment with this,
Logic somehow couldn't see my midi instruments in the Arrange window anymore.
Consequently, I had to re-programme all those settings. I don't know for sure how that
happened, my guess is that I had Logic running whilst installing MidiPipe. Therefore, I
suggest quitting Logic before installing MidiPipe. Now, after using this set-up for a
couple of days, it is perfectly stable and works beautifully.
remaining (small) challenge is getting audio from Rax back into Logic. Rax itself has a
pretty sophisticated audio mixer, and it might be possible to send audio straight to
Logic. I guess it depends on what kind of audio interface/software you use. You can
always simply send audio from Rax through an external FX box, set this to bypass its FX
block, and send the signal back to Logic. I tried that, and it works quite well.
BTW, Rax is a marvellous AU player and recorder in its own right. It can record
at 24 bit, and should be great for live use as well.
I hope this little
article will prove useful. Distribute far and wide. Regards.