Looking for an Audio Interface? I'm completely lost.

I think more than 2 inputs is a bit of a stretch for 90 quid. Something like this maybe.

Blaqbetteh said:

Currently looking at one of these.

http://www.amazon.co.uk/Lexicon-Alp...XMNE/ref=sr_1_1?ie=UTF8&qid=1305729778&sr=8-1

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That does not have enough inputs. The keyboard is stereo and takes up two channels. The guitar and mic each take up a channel. So you need four total. The above has only two.

You are going to have to spend more. I'd at least double your budget.

Also be sure to verify that the mic input has 48 volt "phantom power". You will need that to run a condensor vocal mic.

How will the guitar sound get input. Is it electric and plugs in direct and yu'll be using a modeled amp. Or will you mic a speaker cab or what? Make sure you have the corect input for the method you like. But I'd also make sure you don't box yourself in. Figure you might som e want to do it different or even mic an acoustic guiter.

I think you need to be looking at this class of interface. That box you picked out just is not going to do what you want.
http://www.presonus.com/products/Detail.aspx?ProductId=58

Blaqbetteh said:

...But if I don't have the money, what could I get with like, 3 1/4" inputs?

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You wrote

I'll be hooking up a guitar, a keyboard and a microphone to this (just incase anyone wants to know)

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If the keyboard is stereo then I count FOUR channels not three.

If the Microphone is used for vocals it needs to be a condensor mic that that will require 48V phatom power and you'd hope a good built-in preamp.

Maybe change you requirements and leave off something. but as stated you will need four

will all the instruments be played and recorded at once?

if not, you can get away with two.

If you want the possibility to record an impromptu jam including that guitar, keyboard and vocals then youre going to need to go for at least 4 inputs. Also take into account the quality of the pre-amps - Presonus, Focusrite and Apogee all make excellent pre-amps so are well worth a look.
Again as others have mentioned, if you plan on recording vocals with a condenser mic you will need 48v phantom power.
For about £90, you're probably looking at an Edirol (Rolands cheaper sister) USB interface with 2 inputs unless you keep an eye on eBay. I bought a Presonus Firepod 8 input firewire interface for about £150 around 12 months ago and I think that's the average price for a used model.
Hope that helps