Use of UAD Powered Plug-Ins with RTAS under Pro Tools and Pro Tools LE is fully supported on UAD-1 and UAD-2 in UAD v5.2.0 and higher. RTAS support includes the Mellowmuse ATA plug-in.

When UAD Powered Plug-Ins are used, audio data to be processed by a Powered Plug-In is sent by the host application to the UAD card. The audio is then processed by the UAD card and sent back to the host. This back-and-forth shuffling of audio data is called “buffering” and it produces a latency (delay) in the audio being processed. If this latency is not compensated, the processed audio will not be perfectly synchronized with unprocessed audio (many host-based plug-ins induce latency as well).

Pro Tools LE and Pro Tools M-Powered do not offer automatic delay compensation. Fortunately, UAD Powered Plug-Ins includes the Mellowmuse ATA plug-in which automatically compensates for this lack of functionality in these host applications. For more details about latency and delay compensation, see Chapter 9 in the UAD user manual.

The Mellowmuse Auto Time Adjuster ("ATA") plug-in is bundled in the UAD installer v5.2.0 and higher. The ATA enables automatic plug-in delay compensation in Pro Tools LE & Pro Tools M-Powered for UAD (and non-UAD) plug-ins with just a few clicks. The plug-in is placed into the Digidesign Plug-Ins folder when the RTAS option is specified during UAD installation. Detailed product information: http://www.mellowmuse.com/ATA.html

Mellowmuse ATA is FREE and fully licensed for UAD-2 users; it replaces the UAD DelayComp and UAD TrackAdv plug-ins which have been discontinued for UAD-2.
Note: A UAD-2 card must be installed for the free license. With UAD-1-only systems, the ATA runs in demo mode. By special arrangement with Mellowmuse, UAD-1 users can purchase ATA at a discount using the link below.

Customers with UAD-1-only systems:
Click here to purchase discounted MellowMuse/ATA license

• Pro Tools: LE or M-Powered, version 7.3 or higher
• Windows: Windows XP or Vista; Pentium 4 1GHz CPU or better
• Macintosh: OS X v10.4 or higher; G4/G5 or Intel 1GHz CPU or better

For complete instructions on how to operate the plug-in, please see the Mellowmuse ATA user manual that is placed on the hard drive during UAD RTAS installation:
• Windows: Start Menu>All Programs>UAD Powered Plug-Ins>ATA_Manual.pdf
• Macintosh: Startup Disk/Applications/Powered Plug-Ins Tools/ATA_Manual.pdf

• Use the "Disable Current" button in the UAD Meter & Control Panel application (the big blue button in the main UAD Meter window, aka “Global Bypass”) to disable UAD plug-ins when pinging with ATA. Using the Pro Tools plug-in bypass for UAD plug-ins when pinging will not work properly.
• For best ATA results when pinging with UAD plug-ins, use an audio I/O buffer size of 256 or higher when pinging.
  

• The UAD VST to RTAS Adapter is software that enables Pro Tools LE, M-Powered, and TDM users to utilize the UAD DSP card and Powered Plug-Ins within Pro Tools. Universal Audio has teamed up with British adapter specialists FXpansion to create a version of their popular VST to RTAS Adapter which only works with the UAD.
  
  
• Version 2 of the UAD VST to RTAS Adapter from FXpansion, for Pro Tools version 7.x and higher, is bundled in the UAD installer. It configures the UAD RTAS plug-ins automatically when the RTAS option is specified during installation. The prior version (v1.07ua) of the UAD VST to RTAS Adapter, for use with Pro Tools 6.x and lower, is still available for Windows and Macintosh by contacting customer support.
  
  
• Universal Audio does not provide technical support for the full retail version of the adapter from FXpansion (which adapts all VST plugins, not just UAD Powered Plug-Ins). Contact FXpansion for information about the full adapter version.
  
  
• FXpansion.com features a support email address, their own Frequently Asked Questions list, and an online support forum for support and exchange of tips and information with other VST to RTAS Adapter users.

• Please visit www.digidesign.com for the latest technical information and system requirements for Pro Tools.
  
  
• The adapted UAD RTAS plug-ins require the VST version of UAD Powered Plug-Ins to be installed. The VST plug-ins are installed as part of the RTAS option in the UAD v4.5.0 (and higher) installer. Pro Tools 6 (and lower) users of adapter v1.07ua must first download and install the UAD VST plug-ins BEFORE installing the adapter software.
  
  
• (UAD-1/UAD-1e only) All Pro Tools users should set MIN_GNT to 64 (if it is not already). This setting is found in the Configuration window of the UAD Meter & Control Panel.
  
  
• (Adapter v1.07ua only) Set the Adapter and Pro Tools buffer to the same size for the best performance at all buffer sizes. We recommend a buffer size of 1024 unless tracking.
  
  
• (UAD-1) The UAD VST to RTAS Adapter v1.07ua, for use with Pro Tools 6 (and earlier), can be used with the latest version of UAD Powered Plug-Ins. Contact customer support if you need to obtain this adapter.
  
  
• If you are using Mellowmuse ATA for delay compensation, see the section "Using UAD plug-ins with Mellowmuse ATA: Technical Notes" above.

• Multi-mono mode is not supported.
  
  
• Session compatibility between Windows and Mac OS is not supported (this is a limitation of the FXpansion software).
  
  
• (Mac only) Adding a plugin while the transport is playing may cause playback to stop with an error. Simply restart playback if this occurs.
  
  
• There are known issues regarding noise and clicking when using Mbox that are documented by Digidesign. These issues are not related to the UAD. Please contact Digidesign for more information.
  
  
• (Mac only) Settings in the UAD CS-1 family of plug-ins (CS-1, EX-1, DM-1, DM-1L) are not loaded on PowerPC Macintosh systems when moving from UAD versions before 3.9.0 to later versions. This issue occurs only when UAD plug-ins created with version 2.x of the UAD VST to RTAS Adapter (and also the full retail VST to RTAS Adapter) are active. We are actively working with FXpansion to resolve this issue.
  
  

• www.FXpansion.com
• FXpansion.com: Retail VST to RTAS Adapter FAQ
• FXpansion online support forum

• Support Report: Using UA Plug-Ins in Digidesign Pro Tools Systems
• Support Report: Pro Tools LE & UAD Delay Compensation
• Plug-In Power: Using Your UAD with Pro Tools 7.0
• Plug-In Power: Using the UAD in Pro Tools HD and Automatic Delay Compensation
• Support Report: Introducing UAD Support for RTAS
• Digi-Talk: UAD for RTAS!