Apple have announced the Logic Pro 9.1 update which they say delivers improved compatibility and numerous fixes.
Issues addressed include:

• Support for 64-bit native mode
• Compatibility with 64-bit Audio Unit plug-ins
• File names with over 32 characters are now supported
• Samples are now mapped correctly when using the "Contiguous Zones" option in the EXS editor

Apple say that the update is recommended for all users of Logic Pro 9.
MainStage has also been updated to version 2.1 with improved compatibility and numerous fixes.
Issues addressed include:

• Support for 64-bit native mode
• Compatibility with 64-bit Audio Unit plug-ins
• Improved compatibility with MainStage 1.x documents
• Multiple Playback plug-ins in the same group now sync reliably
• Improved recording when using the Loopback plug-in

Apple say that the update is recommended for all users of MainStage 2.
Pricing and Availability:
Free download More information:

• Logic Pro 9.1 release notes
• Mainstage 2.1 release notes
  
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