What is Apogee's VBus?
Apogee's VBus creates a virtual patch bay inside your Mac, allowing you to route demanding, stand-alone software instruments, directly into Logic or any Core Audio based application instead of running them as plug-ins.

Why do you need VBus?
Optimizing RAM usage
It is a much more efficient use of RAM. Because of the 2 gig limit of RAM per application, you are sharing between your main software and any synth or sampler that you run as a plug in. If you run that same synth or sampler as a standalone application, it will have it’s own 2 gigs of RAM allocated to it. (provided that your computer has 4 gigs of RAM installed).
VBus is also ideal for transferring audio from application to application. Seamlessly send sessions from DAW to DAW... right inside the box. You no longer have to worry about file incompatibility. Simply send audio out of one application to another.

Can I use it with any audio application?
Yes you can use it with any core audio application that supports more then 32 I/O. Since the first 32 channels of the Symphony card are allocated for Analog I/O, you must have 33-64 available in your application for VBus.
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