This is because MainStage does not change the onscreen display to match all possible keyboard layouts. The issue is cosmetic. In cases where the characters displayed on your keyboard don't match, use the the keys in the same physical positions, the correct notes will sound.

This happens with some hardware that uses infinite rotary knobs when you're in Layout mode. It's only cosmetic—after you map the on-screen control to a parameter in Edit mode, it will respond as expected in Edit, Performance, and Full Screen mode.

When a channel strip in Logic is "Solo Safe", it remains audible, even when other channel strips are soloed. Solo Safe is indicated by a diagonal red line through the solo button on a channel strip.

You can manually toggle the solo safe status of a channel strip by Control-clicking its solo button. There are times when you may find that a particular audio channel strip in a project reverts to solo safe mode when you load the project, even after you manually disable solo safe. Here is why that may happen and steps you can take to prevent it from occurring.

A Logic project contains a special audio channel strip used for pre-listening to audio in the Sample Edit window, Audio Bin, and Loop Browser. When you create a Logic project from one of the factory templates, this channel strip is assigned to "Audio 256". This channel strip stays in solo safe mode so that you can always preview audio. The image below shows the channel strip for a new, empty project.

If there is no audio channel strip in a project assigned to "Audio 256", Logic will use the highest-numbered available audio channel for pre-listening. When the project is loaded, that channel strip will be put into solo safe mode. You may find this happens in older projects that you open in Logic 8 or later, or in cases where you have deleted the "Audio 256" channel strip in a Logic 8 or later project. To prevent this from affecting channel strips you are using in a project's arrangement, follow these steps:


	
1. Choose Window > Environment.

	
2. From the Environment window menu, choose New > Channel Strip > Auxiliary. A channel strip will appear in the environment.
   
	

	
3. Select the channel strip.  It will highlight.

	
4. In the Device parameter box in the upper left of the Environment window, click the arrows to the right of "Channel" and choose Audio > Audio 256 from the menu.
   
	

	
5. Select the text tool, click on the name below the channel strip and name it "Prelisten".
   
	 



This may happen if you record a sweep, save, then close a project before deconvolving. When you reopen the project and press "Deconvolve", the recorded waveform disappears; if you create a Space Designer setting, the resulting IR file contains no audio.

To avoid this, always perform the deconvolution step in the same session you record the sweep.

By holding down modifier keys while you open the application, you can put Logic Pro or Logic Express into one of several troubleshooting modes. To do this, go to your Applications folder, double-click the Logic icon, then hold down the respective modifier key(s) from the table below until a dialog appears or Logic is fully loaded.

If Logic is already installed, reinstall iLife '09 to resolve this issue.

When installing Logic, selecting the option to include GarageBand '08 content as part of the Logic Studio or Logic Express 8 installation will overwrite GarageBand '09 content. When you install Logic, deselect the GarageBand content option in the installer.

If you purchased iLife '09 separately, reinstall it from the disc it came on.

If iLife '09 was pre-installed, follow these directions to reinstall it on your computer:



1. Insert the "Applications Install DVD" that came with your computer.


2. Double-click the Installed Bundled Software installer.


3. Click Customize in the Install Bundled Applications window.


4. Click the disclosure triangle to the left of Bundled Applications to reveal the choices.


5. Deselect everything except GarageBand.


6. Click the disclosure triangle to the left of GarageBand and include GarageBand Additional Instruments and Loops.


7. Click Install.