Here’s a pretty tech oriented post for those of you who have been using AU LAB for an audio unit host.

For those of you using AU Lab – the new X code 3.2.5 update is now available – which includes an update in AU Lab to version 2.2.

I did the update this weekend – and couldn’t get AU lab to work for the life of me.  If you’re using a newer mac – you might have better luck – but I was unable to get audio routing to the channel and the program would crash when trying to open a new document.

Based on the release notes I was able to see – the biggest update to the software was an automatic aggregate device configuration.  Which I don’t really get as setting up an aggregate device in Audio MIDI set up is well documented.

That may be the issue with the problems I had but in the meantime I had to go back and install the previous X code version over 3.2.5 to get a working version of AU Lab.

Like I said – You may have better luck if your system is more up to date.  Here’s what I’m running (note: I running 32 bit instead of 64 bit).

Special Note:

This suggestion only involves not using Software Update to install the new X code tools.  If you want to install the rest of the tools and skip AU lab – you’ll have to do it manually

1. just follow the directions below
2. choose X Code 3.2.5 instead of 3.2.2
3. When down downloading choose Custom Install and install what you need

What to do if you DO need to re-install AU-Lab

Re-installing AU lab is not as straight forward as you might think.  There are probably multiple ways to  do it – but this is what worked for me.

While there are a series of paid subscriptions – you can sign up for the Apple Developer Program for free.  This will give to access to previous versions of X code tools (which has AU lab as a component).

Once you register and get to the login screen: Look for a screen called Downloads and Programmer Assets.

Then look for Developer tools.  If you scroll down you’ll see X code 3.2.2 Developer’s Tools – which has version 2.1 of AU Lab.

“Xcode 3.2.2 Developer Tools

Xcode 3.2.2 is an update release of developer tools for Mac OS X. This release provides bug fixes in gdb, Interface Builder, Instruments, llvm-gcc, Clang, Shark, and Xcode. It must be installed on Mac OS X 10.6.2 Snow Leopard and higher. Xcode defaults to upgrading an existing installation but may optionally be installed alongside existing Xcode installations. See accompanying release notes for installation instructions, known issues, security advisories.”

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The download will take a while.  Just do the full install and it will replace the old files.

While not a very elegant solution it is a functional one.

I hope this helps!

-Scott