What to buy depends a LOT on your background and the space you have for recording and what you are going to record. By your questons I'd guess you are a beginner? If so don't go out and buy all of that stuff. Start slower.
Use Garage Band until you can identify some reason no to use it. You don't provide any reason why GB would not work for you.
Why a "duet". I hate dongles and two inputs is very limiting and there is only one knob. And I'd like to see UV meters or LED on the device for each input. Other interfaces will include the MIDI ports on the same box, saving you some cable mess.
Why Melidyne? You've tried Apple's pitch corection and don't like it? Buy things ONLY if you have a good reason.
the SM57 is good for some uses not ideal at all for others. What are you going to use it for?
I don't see any acoustic treatment materials. Are you building a studio or does all of this need to be portable? If portable then you are basically recording a live show. Mic made for studio use are senitive and will pick up every little noise. Mics for live use are placed very close and they are more directional. Need to know who a mic would be used
Thank you for your response.
I've been using Garageband for awhile and I'd like to have more control over the parameters, such as reverb, the compressor, etc. I'd also like to build my own synthesizer sounds using the samplers. I currently "make" most of my synthesizer sounds using existing Garageband instruments and tweaking their individual parameters until I achieve the desired sound. I enjoy buildings sounds on my Roland SH-201 synthesizer, but I prefer working on the computer. I think that the Logic samplers will provide a similar process.
I've used the pitch correction on Garageband and it generally dehumanized the vocal sound. I also tried the 30 day Melodyne trial and achieved much more "natural" results. I especially enjoyed being able to edit each individual note. I assumed that Logic Pro did not have a similar feature, but I haven't actually used Logic yet. I included Auto-Tune because I thought it was more popular than Melodyne, but I haven't used it either.
I currently have a Yamaha GO46 audio interface. It has two inputs, MIDI i/o, and it's portable, but it didn't communicate well with my old MacBook Pro. Even with the drivers installed, I would have to restart a few times for Garageband to recognize it. My friend has the original duet and his MacBook Pro recognizes it instantly. Since the Duet was built for Macs, I figure it'd be the best option. It doesn't have MIDI i/o, but I can use the MIDI to USB cable in addition to the Duet. The two inputs have not caused any problems yet because I've only recorded vocals and guitar. I don't plan on recording any drums, but I assume I could somehow manage to get a decent mix with two microphones. If not, my friend/roommate also has a FirePod and a collection of microphones I could borrow; however, I don't really like his FirePod (sound cuts out often) and I'd rather have my own equipment.
As for microphones, I picked the top selling Shure SM57 because many reviews stated that it was rugged and versatile. It'd be nice to have a microphone to throw on a cabinet for a raw sound (although I heard the amps in Logic are great). The Bluebird was on the Apple website so I figured it couldn't be too terrible. Plus I could use a condenser. I have a few terrible dynamics microphones and a dynamic ribbon microphone that a music store sales associate persuaded me into buying. It's good for lows, but it cuts out at around 15kHz. Any suggestions on microphones is highly appreciated. They'll be used for acoustic guitar, vocals, and assorted percussion instruments.
I've never owned studio monitors so I picked the best selling set. Any suggestions on studio monitors would also be highly appreciated. I have some questions though: Is the subwoofer necessary? Can I also use them to listen to music on iTunes? When I get my new MacBook Pro I intend on loading my cds at 192kbps, which I hope is enough to not damage the speakers.
I'd like to soundproof my room, but the foam is expensive. Any suggestions on less expensive, alternative options? I'm renting an apartment for a year, so permanent treatments are out of the picture.
Thanks!