(There's no video for AU Lab 2.2 yet. Please contribute to MR and add a video now!)
free digital audio mixing application, AU Lab, is used as a host application for Audio Unit effects, including AURoundTripAAC Audio Unit. auditioning audio, detecting peaks and clipping, and performing double-blind listening tests.
(5.39 MiB / 5.65 MB)
osx ppc. higher versions require lame intel cpu's.
Emulating this? It should run fine under: QEMU