Cliff Goldmacher is a songwriter, producer, engineer and the owner of recording studios in both NashvilleNew York City. Cliff is also a regular contributor to EQ Magazine and Pro Sound News. He can be reached at cliff@cliffgoldmacher.com.
Read Part I of this article.
For the second half of this article, I’m going to get a bit more technical. After covering your set up, the room and mic choice/placement in the first half, it’s time to get into the more technical issues of the actual tracking and subsequent use of EQ and effects.
Click Track Bleed
OK, now that your room is ready and your mic is placed, you’re going to want to take additional precautions to avoid the bleed of the click track sound from your headphones and into the mic. This is one of the most common mistakes people make when recording acoustic guitar to a live mic. My recommendation is to avoid high frequency tones like shaker or woodblock and consider a low tone like a sampled kick drum. Low frequencies don’t have the same piercing effect through headphones that most click sounds do. Also, once you’ve played the song through the first time, you can actually automate the volume of the click sound to lower in soft passages and drop out at the end of the song if there’s a ritard or a long sustain on the last note. There’s nothing that kills the mood of a song like the sound of a click track peeking through over the final chord.
Front End EQ/Compression
If you’re using a preamp and/or compressor between your condenser mic and DAW, there are a couple of things to bear in mind. If the mic pre has a high pass filter, setting the frequency to between 60hz and 80hz will go a long way towards minimizing control room noise. Also, while heavy front-end compression on acoustics can give the guitar a very present, powerful sound, I tend to avoid it in this scenario because it amplifies to a great degree the noise of the room we’ve worked so hard to minimize. I will, however, use a very light front end compression at a 3:1 ratio just to take the edge (two or three dB tops) of off the loudest parts of the track which then allows me to make the overall recording level hotter.
Back End EQ/Compression
Once you’ve recorded your acoustic, there are a few EQ and compression tricks I tend to use to help get the best sound possible. My EQ approach changes depending on whether the recording I’m making is a simple guitar/vocal or one where I’m planning to overdub additional instruments. For a guitar/vocal, I’ll be more sparing in my EQ. I tend to use 125hz as a place to pull a few dB if the recorded acoustic sound is slightly muddy or diffuse and 5000hz as the place to boost if I need a bit more brightness (see fig. 1). When it comes to integrating an acoustic into a fuller mix, especially one with drums and bass, I have a more dramatic approach that involves setting a high pass filter to effectively remove all frequencies below 120hz. This allows the proper sonic space for bass and kick drum while leaving the meat of the acoustic sound untouched. The approach to adding brightness is the same as above and can be added by boosting a few dB at 5000hz (see fig. 2). I tend not to compress the acoustic in the mix on guitar/vocals but when it comes to a band mix, it can really help the guitar to maintain its presence. I will generally compress at a 2.5:1 ratio with a fast attack/slower release approach (see fig. 3). Finally, given how easy it is to store settings, you might want to create acoustic guitar EQ and compression settings in your favorite plug-ins to speed up the process.
Wrapping Up
I happen to be a big fan of control room recording. It brings a great combination of casual and intimate to your session. So although it takes a bit more preparation and a little more care in the process, you can get great-sounding control room acoustic guitar parts without having to rely on anyone but yourself. Good luck!