Apple Logic Pro /LogicExpress Discussion

>...As I play an arrangement,
> occasional noise wil occur. ...("Warning: the selected environment objects 
> have an unknown or illegal format. ... I have to force quit.

Its really hard to know what is going on there. I get occasional nasty noise - when using 
Digi's drivers before, and even occasionally when using M-Audio's drivers. However, 
consdering that you are getting strange errors, I think you need to create a new file from 
scratch then import, drag and drop, or copy and paste from your existing song to a new 
song, then save that. You might try running the sudo maintence things and the diskutility 
repair permissions. those seem to fix some things. You might also see if your electrical 
supply is filtered in case a guy down the street is running power tools.


> My last question is regarding system overload. As I press play, my
> arrangement starts, and shortly after, a message pops up indicating that:
> "CORE AUDIO: System overload. The audio engine was not able to process all
> required data in time (-10011)"
> Why is this ?


There is a trick you can use. Instead of hitting PLAY, instead hit the space bar for pause 
then hit again to Un-pause. For some reason, you can get around some of the disk 
overload using this trick. Many times when there is an overload it occurs during the start 
up of the track. I think Pause, loads the sounds in a buffer in advance, and then plays from 
there.