I don't have an AudioBox, but I can describe what I do with my M-Audio Fast Track Pro.

First of all the Ketron unit is a MIDI out device (there's no MIDI input from it, it just receives MIDI data sent out from your computer). So, you'll need to have some sort of MIDI output device from your computer. My Fast Track pro is connected to my computer via USB and the computer sees it as both an audio in/out and a MIDI in/out device. I plug my Ketron into the MIDI Out connector on the Fast Track Pro using the MIDI in on the Ketron (yes, that can get confusing).

So when I tell my computer to send data out to the Fast Track pro, it will go to the Fast Track Pro and is ten passed along to the Ketron SD-2 via the MIDI Out port. The Ketron receives the MIDI data, but it doesn't send it back to the computer (because the MIDI interface is for the note one/note off/velocity/etc data only, not for the actual sounds). To hear the sounds you need to one of two things. The back of the Ketron has a right/left (red/white) RCA connector that you can use to send audio data to any device that accepts audio. This could be powered speakers, an amplifier, or the Line-In connector on your sound card. There is also a headphone jack on the Ketron, so you can hear sounds that way also. The slider on the front of the unit is the volume control for the Ketron.

I connect the audio out on the Ketron to the Audio In on my Fast Track Pro. That allows me to get the audio sounds back into the computer to record the sounds the Ketron is generating. And the Audio Out of my Fast Track Pro goes to my powered speakers so I can hear the sound.

One thing about the Ketron is that, unlike using a DXi or VSTi synth is that you cannot do direct renders of the audio within the software. To capture the sounds of the Ketron, you have to arm a track in your DAW and then record the song from beginning to end. I do that and then mute the MIDI track, so it's not double tracking.

(Above is the simple connectivity. The reality, though, is that I don't actually feed the Ketron directly into the Fast Track Pro, I actually feed it into an input channel on my little hardware mixer, and then feed the mixer to the Fast Track Pro. This allows me to also connect microphones and the audio out from my Casio keyboards into the mixer to record audio that way also. But the idea is still the same - the audio still needs to get back to the computer to capture the sounds).

Hope that made sense.

John

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