Caveat - I'm making some assumptions here, as I don't have the equipment in question, but logically, I believe this will work.

Connect the USB-to-MIDI connection you are going to buy to a USB port on the computer and then with a 5-pin MIDI cable, connect it to the MIDI IN on the Kurzweil unit.

Connect the Scarlett Solo to another USB port on the computer. Connect your speakers or headphones to the Scarlett output (so you can hear what you are doing. You will use the Scarlett as your "sound card".

Connect the audio output of the Kurzweil to the audio input of the Scarlett Solo.

In your DAW, select the USB-to-MIDI connection as your MIDI OUT (so that MIDI data gets sent there.

In your DAW, select the Scarlett as your Audio IN and your Audio OUT (which will occur across the two way connection on the USB cable). That way, you can record sounds from your Kurzweil into your DAW. And anything you play from the computer will be heard on the speakers (or headphones) connected to the Scarlett.

If you want to record a guitar or vocal connected to the Audio IN on the Scarlett, you will will have to disconnect the Kurzweil unit from your Scarlett, since it only has one stereo input. So you can only do one at a time.

That way the routing for recording MIDI will be:

MIDI data on a track in the DAW software --> out to the Kurzweil unit --> which creates the MIDI sounds in the Kurzweil unit --> and sends it out the audio output of the Kurzweil --> and into the audio input of the Scarlett --> and from there the audio can go back into the computer to record and/or be played back out the speakers of the Scarlett.

Hope that made sense.

John

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