There is another way of hooking up that mixer to the AP2496. This is what you will need to do if you are also monitoring out of the same mixer. If you hook the "main outs" of the mixer to the "ins" of the audiocard, and the "outs" of the card to one of the channels of the mixer to listen to what you have already recorded, you are going to create a loop:
i.e. if you have your guitar plugged into channel 1, and want to record a solo overtop of the first take you made, and are listening to the first take on channels 5/6, the whole mess is going out the main outs, and you are going to end up recording "everything you hear". to avoid this problem, you need to record out of the Aux outs (or FX out on this board).
In other words:
The FX send needs to go to the soundcard "in": you need a 1/4" to two RCA plug cable for this.
The soundcard "outs" go into any stereo channel (5/6, 7/8, 9/10, 11/12). Here you need a dual 1/4" to dual RCA cable.
Then, for recording, you set your "send" level from the Fx knob (red knob) for the channel you are recording. You will be able to monitor this signal as it will be in the main mix. Then, everything that is already recorded will play back into the channel you setup to be the "out" from the soundcard. Ensure that this monitoring channel has the FX knob turn all the way off so taht it doesn't send anything back out the Fx loop.
The downside: you can only record Mono: the Fx send is only Mono.
If you need to record in stereo, then you have to use the main outs as mentioned above. Downside is major here: the out from the soundcard cannot come back to the board, or you will have the loop problem I mentioned previously: everything that comes into the board goes out the main out.
Basically, if you want to take advantage of the two inputs to the 2496 to record in stereo or to record two separate tracks, you either have to have two mixers: one for sending signals to the card, the other for monitoring what is already recorded. Or you need a mixer that has two aux outs so that you can pan one left and the other right.
I have
the Behringer Eurorack 602A, and it has the same limitation. I currently can only record in mono, one track at a time.
