Can I use Apogee Duet with a MIDI keyboard?

If you mean to use your keyboard as a MIDI controller, then does it mention MIDI anywhere on the Apogee Duet? If not, you will need to use an interface that supports MIDI as well as Audio.

(MIDI connectors are 5-pin DIN, if that's any help to you in identifying sockets.)

You can usually only use one interface at a time with Logic (although you can create an Aggregate Device to get around this if it is a genuine problem). Therefore if the Apogee Duet is installed you might not be able to use another keyboard simultaneously.

However, there are exceptions, & I'm not familiar with this particular interface, so the best thing is to check the manual.

🙂

Of course, you can still record Audio (in Logic) from your keyboard's audio outputs, assuming that by "standard analog" you mean 1/4" Jacks…

Some interface devices have both analog inputs (like Duet) as well as MIDI inputs. However, the Duet is ONLY for inputting ANALOG inputs such as instruments, microphones, or any other source of analog signal.

Some computer interface devices off both analog and MIDI inputs, Duet is just not one of them.

Previous poster suggested Logic cannot handle two devices at the same time. I would like to clarify that a bit. I use both the Duet and my USB MIDI keyboard (plugged directly into laptop USB port) simulaneously so that type of parallel usage is indeed ok. However, Logic/Apple System preferences only allow ONE "sound source" whether coming in via USB or Firewire (all "choices" are in a pick list so by definition they are all mutually exclusive).

For example, I cannot have my Line 6 Pod X3 and my Duet both "active" at the same time. I am forced to choose between either the X3 as my "sound source" or the Duet. This does not hinder me in any way as I use one, and then simply select the other when the next track calls for it.

You could have this setup all working in parallel:
1) Duet for instruments/Mics
2) MIDI Keyboard (USB) plugged into USB port
3) older MIDI Keyboard (MIDI) plugged into M-Audio "Uno" <http://www.amazon.com/M-Audio-Midisport-Uno-MIDI-Interface/dp/B00007JRBM/ref=s r 11?ie=UTF8&s=electronics&qid=1246910365&sr=1-1> which is plugged into 2nd USB port

For 2 and 3 once they are both USB you could also buy a 2-in/1-out USB switch <http://www.amazon.com/Cables-Go-2-Port-Manual-Switch/dp/B0002JUHS4/ref=sr 11?ie=UTF8&s=electronics&qid=1246910305&sr=1-1> if you wanted only one USB port on your computer used for keyboards.

The Apogee Duet is an Audio Interface only, for recording and playing sound, to professional standards. It turns any modern Mac into a hi-end two track digital sound recorder. But your piano keyboard cannot do anything with it, other then record the Audio output from it.
You can use your USB keyboard (which make & type is it?) to play Logics' software instruments. If the piano keyboard only has MIDI connectors, you either need a MIDI-interface for that, or for the USB keyboard to have a *MIDI in* port.
If you need both an Audio and a MIDI-interface, there are cheaper models that'll do both. The best device to use, as you put it, really depends very much on what you want to do with it, and of course what your budget is.