Can't get my Radium 49 recognized by my comp and/or logic

Can you detail your audio chain? If you use several devices connected together with digital, you have to set one device with the master clock and the others have to sync their clocks to the master.

Ok, this is pretty simple to fix. First of all, even if there's a breakout cable at the Firebox for both midi and S/PDIF, you're not connected on S/PDIF but on the midi in. This is not related to your problem but important to know.

Now, to the problem: you use two different interfaces: the Firebox and the computer built-in. Since those are two different drivers and Logic can talk to only one driver at once, you have to set-up an Aggregate Device in AMS. Open AMS, select the audio tab and from the audio menu, select Open Aggregate Device Editor. There, create a new device with both the Presonus and the built-in. Now, all you have to do is going back to Logic, open the audio preferences, select the drivers tab and select the aggregate device.

Like I said, you have to go the audio preferences in LE, select the drivers tab and select your new aggregate device as the new driver.

Can you hear something else from your speakers, i.e. I Tunes ? After setting up your Logic Preferences, did you select the right output from your audio tracks? Maybe you're sending your tracks to the Firebox instead. Can you hear something if you connect speakers or headphones to the Firebox?

If the metronome works, that's a good point. If I check your previous posts, the problem is that you don't hear your Radium. Can you hear an audio track? If you didn't record anything audio, you can always open the Loop Browser and put an Apple Loop in the arrange window to test that. If you can hear that loop, the problem is not on the audio side.

The Radium is a midi controller, it won't generate any sound. If you want to hear something, you'll want to assign it to an audio instrument in Logic. Easiest way: take an audio instrument track, select a synth in the input section in the channel strip at the left and play. If there's midi information coming in the transport window, you should see the meters on the channel strip moving.

When you are on the arrange window, there's the Channel Strip at left. If you click on the input section, you can see a menu with sub-menus (mono, stereo, multi outputs) and then, if you select one of these appears another sub-menu. If you go to Logic, all soft synths available are listed there. Note that if you select EXS24 (the sampler) there's a lot of patches available in the EXS interface (piano, brass, drums, strings, etc) Check the Logic Plugins Reference for more information about the various synths available.