The simplest reason to get a mixer is to mix things and have more control. But mixers can make many tasks much easier for podcast production.
@SavageTechman asked me to cover why a podcaster should get a mixer. Here are my ten reasons and I would love to hear why you use a mixer for podcasting!
Many programs can do a great job of recording Skype calls on your computer. Namely, I recommend Ecamm Call Recorder for Skype (OS X), or Pamela (Windows). But either of these put more reliance on your PC and each have their own limitations.
Running a Skype “mix-minus” sets up your mixer so that it sends everything to Skype except for the Skype audio. This prevents the Skype guest from hearing themselves.
If you have more than one microphone, then a mixer will be your best way mix the mics into a single recording. Depending on your PC and software, you can sometimes get by with a few Audio-Technica ATR2100-USB mics, but you'll have to hack things together and use extra software.
A mixer simplifies the process. Just plug in more mics, turn up their volume, and you're ready!
Playing sounds—music, sound clips, voicemails, and such—into your recording will save you a lot of post-production time. Instead of editing your sounds into your recording, you can simply play them in with a mixer and they're recorded!
Have a quiet cohost and need to raise their volume? No problem! Want to fade out your music while you're talking? No problem! Want to quickly mute while you or your cohost coughs or adjusts a mic? No problem!
A mixer gives you more control over the audio in your recording. You can mix, mute, solo, adjust volumes, and much more. And it's all done live, while you're recording, and can be quite seamless.
USB mics and headsets are popular ways for podcasters to start, but they're usually cheap equipment that produce poor audio. If you want to step up your quality, you'll most likely get a microphone with an XLR plug. This is no problem for connecting to a mixer!
Having a mixer also allows you to connect with almost any other audio device: RCA, 1/4″, stereo, mono, XLR, balanced, unbalanced, inputs, and outputs.
Investing in a quality mixer also means you can continue to upgrade your other equipment but keep the same mixer for many years.
All microphones require a preamplifier. It powers the mic and amplifies the signal to a usable level. You can get XLR-to-USB adapters or use other XLR inputs. But if the preamps are cheap, you'll record a constant hiss into your recording.
Professional mixers above the $100 price floor usually have moderate-quality preamps that will raise the volume of