>> Yes, when j-bridged, 32 bit BIAB will let me load up and play libraries in 64 bit Kontakt – but only if the Kontakt instruments stay below the memory limits imposed by BIAB's 32-bit design.

Kontact is a 64 bit VST - it is using the memory, not jBridge or Band-in-a-Box (have a look at Band-in-a-Box memory use when you load that 9GB VST- it won't budge - because the VST is just passing it buffers of audio during playback that are then discarded by Band-in-a-Box after use.

So if it (the VST) is telling you that it is out of memory, then the 64-bit VST is out of 64 bit memory. There is no 32 bit limit for VST's jBridged to a 32 bit app like Band-in-a-Box. Perhaps you could be more specific than "out of memory", such as what app gave the message, and what did it say exactly.

If you're using a 9GB sample library, you're already over the memory limits of Win7 64-bit Basic, and it of course depends what other apps you have running, and how your VST manages memory when loading in different VST's - if it keeps them in memory, then you could easily get "out of memory"

Physical Memory Limits: Windows 7
Version Limit on X86 Limit on X64
Windows 7 Professional 4 GB 192 GB
Windows 7 Home Premium 4 GB 16 GB
Windows 7 Home Basic 4 GB 8 GB
Windows 7 Starter 2 GB N/A

The next time you get an error message about out-of-memory, open task manager and see what-memory us being used by what-program

Have Fun!
Peter Gannon
PG Music Inc.