In part 3 of our 5-part post series, How To Build A Home Recording Studio, I mention two ways to set up a recording studio on your computer:
Setup 1 is a microphone plugged directly into a computer. This can really only be done using either an old-style computer microphone - the kind with the 1/8th-inch plug that you can insert into a computer's built-in sound card, or a USB microphone (which, as the name suggests, plugs directly into a computer through a USB port).
Setup 2 is a condenser microphone plugged into an audio interface unit, which is then plugged into a computer, usually via USB.
I recently received a request from the Home Brew Audio YouTube Channel to provide a comparison of a recording made with configuration 1 versus a recording made with configuration 2. So I did just that. Both recordings below were made using Reaper recording software.
To demonstrate a recording using setup #1 recording, I used a Samson Q2U USB microphone plugged directly into one of my my Windows 7 computer's USB ports. This is just a voice recording. Use headphones to get the full effect of the difference between these two recordings. Pay particular attention to the hissy background noise in the USB mic recording. Here is that recording:
For the demo of configuration 2, I used a large diaphragm condenser mic - a Rode NT2-A, plugged into a Focusrite Scarlett 2i2 audio interface, which was plugged into my computer via USB. That recording is below:
When comparing the two, listen not only for the noise, but for the overall quality of the sound. Both recordings were normalized to the same average volume so that loudness would not be a factor. Also, neither sample received any noise reduction treatment.
Speaking of noise reduction, most USB mics benefit greatly from the application of noise reduction or removal effects. USB mics tend to have a steady hiss in the background, which is easily reduced without doing much, if any, harm to the audio. Just to demonstrate this, I added a 3rd recording. This one is the same audio used in the configuration 1 demo, using a Samson Q1U USB mic. But I've applied noise reduction using a built-in effect in Reaper called ReaFIR. See our article on using ReaFIR here - ReaFIR Madness – The Hidden Noise Reduction Tool in Reaper. Below is the USB mic with ReaFIR applied:
Notice how much better that audio sounds with some noise reduction? And it wasn't some fancy (and costly) noise-reduction program. It was an effect that is built right into Reaper. If you don't know much about Reaper, check out the details at their site here. They have a 60-day free trial. Then when you want to buy (cuz you will;)), it's only $60! Then if/when you start making $25 grand a year with it, you'll want to pay for the commercial license, which is $225. But the software is the same! It's based on the honor system. Yeah, I know. That's pretty amazing.
So there is a short comparison of two home recording studio setups - one with a USB mic (setup 1), and one with a condenser mic going through an audio interface which is plugged into the computer via USB.