In this Back Stage Indie Report tutorial, we’ll take a look at recording the acoustic guitar, one of the most difficult instruments to get right!
The first thing to do before you start recording is to pick the microphone you think is best to record with.
Recording Acoustic Guitar
You’ll want a good small-diaphragm condenser microphone. A good choice, and if you’re on a budget is the Marshall MXL 603S, but if you’re looking for a much better upgrade, the Neumann KM184 does the trick.
For acoustic guitar, you can do two different techniques: a single, or mono, microphone technique, or a two-microphone, or stereo, technique. What you do is completely up to you and what resources you have available.
For recording acoustic instruments in the highest quality, you’ll want to use a condenser microphone rather than a dynamic microphone. Good condenser microphones for acoustic guitar recording include the Oktava MC012, Groove Tubes GT55, or the RODE NT1. The reason you want a condenser microphone rather than a dynamic microphone is very simple; condenser microphones have much better high-frequency reproduction and much better transient response, which you need for acoustic instruments. Dynamic microphones, like the SM57, are great for electric guitar amplifiers which don’t need as much transient detail.
Take a listen to your acoustic guitar.
Single Microphone Technique
If using just a single microphone, you’ll want to start by placing the microphone at about the 12th fret, about 5 inches back.
When using a one-microphone technique, you might find that your guitar sounds lifeless and dull. This is generally fine if you’re going to be mixed into a mix with many other elements in stereo, but should be avoided when the acoustic guitar is the primary focus of the mix.
Two-Microphone (Stereo) Techniques
If you have two microphones at your disposal, put one around the 12th fret, and another around the bridge. Hard pan them left and right in your recording software, and record. You should discover that it’s got a much more natural and open tone; this is really easy to explain: you have two ears, so when recording with two microphones, it sounds more natural to our brain. You can also try an X/Y configuration at around the 12th fret: place the microphones so that their capsules are on top of each other at a 90-degree angle, facing the guitar. Pan left/right, and you’ll find that this gives you a more natural stereo image sometimes.
Using The Pickup
You might want to experiment using the built-in pickup as well if you’ve got the inputs to do it.
Mixing Acoustic Guitar
If you’re mixing acoustic guitar into a full-band song with other guitars, especially if those guitars are in stereo, you might be better off with a single-mic technique, because a stereo acoustic guitar might introduce too much sonic information into the mix and cause it to become cluttered. If it’s just you playing guitar and vocals, a stereo or doubled mono technique will sound the best.
Compressing acoustic guitar is subjecting; a lot of engineers will go both ways.
I personally hardly ever compress acoustic guitar, but a lot of engineers do. If you chose to compress, try to very lightly compress it – a ratio of 2:1 or so should do the trick. The acoustic guitar itself is very dynamic, and you don’t want to ruin that.
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