Logic 7 Express Options

[peterpen]

Just got Logic Express 7 - using it on an eMac with an Edirol PCR-A30 controller and Harmon Kardon Soundsticks.
But I'm not hearing anything when I play something on the controller. I can see that the MIDI signal is going in and it is getting recorded, but there's no sound.
Total newbie question, but hey - that's what I am.
any tips?
thx,
peterpen

[Pipeline35]

First off, midi is not an audio file, per se. A midi file only instructs an audio device how to deliver the sound. Kind of like a player piano roll if you have ever seen one. The information on a piano roll is useless unless you have a player piano to translate it into audible notes.
I digress.
You need to bounce the sequence to disk before you can leave Logic with your mix intact... which leads to the issue of selected file format for your bounce.
Secondly, I do not recommend mP3 as a medium for your final audio. Broadcast wave is the chosen industry standard for archiving music. mp3 is a codec that is designed to compress the file size to meet the demands of consumers whom want to exchange music files quickly. While it is debatable whether the information lost in this kind of compression is noticeable to the human ear (certainly so, in my opinion--but I am an audio snob), I suggest that the final master file of your mix be a "lossless" file format (these include: SDII, wave, broadcast wave, AIFF, etc.).
You can always make a conversion copy as an mp3 later, if you decide to share a smaller size file with your audience.
Hope this helps,
As far as Logic and M-Audio are concerned, I leave those questions to be answered by more qualified people, as I am a ProTools engineer.
Good luck!