I figured the condenser mic would be good for drums and vocals. Am I wrong? Should I consider an SM-58?
The SM57 is widely considered a very good drum microphone and people have been singing into an SM58 for a very long time. People with sharp voices can get into trouble with condenser microphones. There are posters trying to read for audiobooks into beginner-quality condensers and producing tracks crisp enough to cut paper. Not pleasant to listen to.
It doesn’t have to be professional quality.
It kind of does:
I just need clear sound at good volume and no distortion or noise.
Most professionals would be happy with that.
I don’t know what else to tell you. One microphone is a natural and there are a lot of options. Two microphones as separate channels can be done with a stereo USB mixer (or analog stereo mixer and USB adapter which is the way I did it) and the microphone channels pushed hard-over into left and right. Mix-down later. This is similar to the tiny USB MicPres such as the Scarlett 2i2. The 2i2 isn’t a mixer. Whatever you plug into the left socket is recorded on the left. The right socket to the right. No option.
http://www.sweetwater.com/store/detail/Scarlett2i2
Also see: cyrano up the thread.
By the time you get to three microphones your only option is a multi-channel soundcard or multi-channel stand-alone recorder. I have zero experience with those. We have a forum on multi-channel.
Koz