Recording electric bass, again…
Friday, June 18th, 2010
I was playing back some tracks that I had recorded for a song called “True Star”. I had long since decided that these tracks were complete. However, as I tried to work up a preliminary mix, I became convinced that something was wrong with the bass. There wasn’t anything I could do to this track to get the instrument to sound alive. What happened? I thought I had this. The performance of the part was great, but the tone was just DOA.
I can’t understand how I didn’t notice the problem during the tracking stage because I was recording the bass direct and was convinced that I was capturing everything I needed to sculpt the bass sound during the mixing process. It had a thunderous quality to it in my cans and I hardly ever EQ anything on the way in, for fear that I might filter out a crucial part of the signal that I might need later.
OK, a lot of jargon there. If you’re not in my head or not a recording engineer, I might have lost you.
Direct – Recording direct means that you’re recording an instrument by connecting its output directly to the input of your mixing console or recording device, without the use of a conventional instrument amplifier. It is fairly common practice to record electric bass or electronic keyboards direct. Yes, sometimes you put a mic in front of an amplifier, but for bass, I only do that when I need the sound of a speaker flopping around.
“EQ on the way in” – An equalizer is a tool used in audio that enables you to cut or boost certain parts of a signal’s frequency range. Think of it as a high class tone control. Some recording engineers apply equalization to instruments to alter their tone before they’ve recorded anything. The drawback to this practice is that when you record all of the instruments to separate tracks and then play them back together, some of them may require a different tone altogether. If you’ve captured the instruments as purely as possible, you have a better shot at using equalizers to get the sound you want. If you’ve EQ’d on the way in, you might not have the frequency spectrum that you need to cut and boost.
For example, assume that while recording guitars, you notice that the guitars are a little boomy (too much bass), so you use an equalizer to make them sound thinner. The sound is filtered but the guitars sound better. During mixing however, you decide to go with one guitar for the song instead of two, so you mute one. That one guitar, which you thinned out with an equalizer “on the way in” now sounds too thin (not enough bass). If you’d have recorded the guitar without any EQ, you might have that fullness you want. You might be able to use an equalizer to bring it out. However, you recorded the guitars thin by equalizing them first. The lower, fuller part of the frequency spectrum was filtered out and never recorded. Therefore, it can never be brought out with EQ. You’re hosed. I knew an engineer who used to call recording “taking a picture.” It was a pretty good metaphor in this case. If you cut off the top of grandma’s head when you framed the shot, you’re never going to make it appear when you print the picture. Her head was never in the shot. You’re hosed.
Oddly enough, I’ve read that Todd Rundgren always EQ’ed on the way in. In the Meat Loaf autobiography To Hell and Back, Meat describes the problems it caused when he hated Todd’s mixes of Bat Out Of Hell and tried to give the job to another engineer. Eek!
Cans – Another word for headphones.
So what was up with my bass sound?
Impedance mismatch. Impedance is resistance to alternating current, but it’s not important that I explain the physics in detail. Suffice it to say that electric guitars and basses are high impedance sources and mixer inputs are generally suited to low impedance sources. I recorded my original bass track using an input that was supposed to have been designed for direct recording of guitars. Somebody’s guitar maybe, but not mine. The impedance rating was just too low. After a lot of research, reading of specifications for my various pieces of gear and experiments with 4 different methods of recording the bass, I determined that due to impedance mismatching, I simply wasn’t taking the picture of my bass.
Because of physics and junk, when you have an impedance mismatch condition, your bass signal loses a lot of the frequency spectrum and sounds dull and lifeless. I had plenty of low end, which I heard in my headphones, but when it came time to mix, my signal didn’t have the goods. So much for these new-fangled digital audio interfaces, eh? “You don’t need a direct box! Plug your guitar or bass right into the input of your insert audio interface model of your choice here!” What nonsense, at least where the Echo Layla 3G, my interface, is concerned.
So, like I would have done 15 years ago, and should have done a long time ago, I bought a new direct box, which converts a signal from high impedance to low impedance. I had one back then and always used it for bass (before I went digital). I re-recorded the “True Star” bass part in short order. I just played it back and wow! Do I love Fender Precision Basses! When you record them correctly, they sound fantastic, right off the pickups, no amp required.
Like Levon Helm said when listening to the piano track of “Rag Mama Rag,” it’s easy when you know how. Despite my adoption of new technologies, sometimes what I used to do still works best.

