In an earlier series, I wrote about the power of gain staging to structure your mix and shape your sound. I wanted to touch on that again and lay out a plugin chain that recreates an analog workflow. In short, it looks like this:
- VU Meter
- Console Input Stage
You can use any of your favorite plugins for this, but below I’ll go through the ones I like and how I’m using them to shape the mix.
Clipper // TDR Limiter 6 ($60)
DAWs work in 32-bit floating point resolution, which means they’ll let you get away with murder as far as gain-staging goes. Placing a clipper first in the chain simulates how analog gear responds to peaks; come in too hot and it shaves them right off.
Keep in mind that if you’re gain-staging properly, you should only be clipping off a peak or two across the whole song; this is just a safety to catch the big spikes. Vocals and sustained instruments should’t be anywhere close to clipping; as such, I only use this on percussive tracks such as drums & slapped bass.
Limiter 6 is an incredible plugin, and a full-fledged mastering tool in its own right. Here, I’m just using one of its modules to clip off incoming peaks. You can tune it to focus on LF & HF content, and you can set a soft or a hard knee as desired; I usually set it to a -6dB threshold with a 2db knee. Continue reading “Digital Tape: Recreating Analog Signal Flow in the Box”
Note: the following post makes use of Klanghelm VUMT and TDR Limiter 6. To get the most out of these posts, head over to their sites and support some awesome developers!
In our last post we covered how to apply analog gain-staging practices to melodic material. However, our ears respond much differently to percussive material, which is composed of transients instead of tones.
A PPM meter responds much more quickly to level changes, and as such it’s better suited to drums and percussion. Using VUMT, pull up a DIN meter and apply it to a snare or kick track. Adjust the pre-fader clip volume so that the needle is reading a little under 0.
Here’s an example of a snare track after I’ve adjusted the gain:
You’ll notice that while the hits are fairly consistent, there are couple hits around the 1/3rd mark that are much louder than the rest. In our last post, we dealt with this problem by manually adjusting the volume; while this is a completely valid approach, it’s not always an option to go through hundreds of hits by hand. Instead, let’s take an analog approach. Continue reading “Digital Tape: Gain-Staging Drums”
Note: the following post makes use of Klanghelm VUMT, an incredible plugin that costs about $15 USD. To get the most out of these posts, head over to the site and support an awesome developer!
Hugh Robjohns begins his article on VU & PPM meters with the following quote:
These are both, strictly speaking, obsolete analogue metering formats! In short, the VU meter shows an averaged signal level and gives an impression of perceived loudness, while a PPM indicates something closer to the peak amplitude of the input signal. However, in our modern digital world, neither meter really performs adequately.
He has a point; if you’re mastering for broadcast, you want a digital meter that’s able to respond with pinpoint accuracy. However, I’d like to focus on part of that quote:
The VU meter … gives an impression of perceived loudness.
While digital meters do a great job of letting you know if your signal is clipping, they don’t correlate much with what you’re actually hearing. One of the reasons people love mixing outside the box is that analog meters move the way the music does. So let’s set up some analog meters.
Klanghelm VUMT is my favorite meter plugin, and it has far more features than we’ll need today. For now, just bring it up as a simple VU meter and apply it to a vocal track. Adjust the track volume (pre-fader) in the DAW so that the meter is reading around 0VU for sustained vocal phrases. Continue reading “Digital Tape: Gain-Staging Vocals”
In my opinion, gain-staging is the most important step of the mix process. Properly preparing your audio sets the foundation for your mix; unfortunately, this step is often neglected or misunderstood. So in the hopes of simplifying this process, I’m starting a series of short posts on how to apply analog mixing practices to the digital domain.
One of the biggest differences between analog & digital is the way the equipment responds to level. When recording through tape & tube equipment, there’s a sweet spot in the middle of the range where fidelity and signal-to-noise is optimized. Get the level too low and your signal gets lost in hiss; get the level too high and it’ll distort. 24-bit digital is an entirely different picture; get the level too low and it’s not much of a problem, as long as your peaks aren’t clipping. Compounding this problem is the fact that digital meters don’t do the best job of representing what we actually hear.
Because we’re not fighting for a smaller sweet spot, we tend to be more relaxed when it comes to gain-staging in the digital world. This is fine for recording, but it creates big problems when you enter the mix stage, because:
- if your levels aren’t consistent, your faders won’t be representative of the actual mix.
- if you have multiple tracks that are close to peaking, they’ll clip your master bus when combined.
- saturation, distortion, and analog-emulation plugins are level-dependent just like analog gear.
What we want is tracks whose levels are consistent in relation to each other, high enough to optimize signal-to-noise, low enough to leave plenty of headroom on the master bus, and gain-staged for use with analog emulations. How do we do this? Read on.
>> Digital Tape, Pt. 2: Gain-Staging Vocals
I want to take on the mindset that recording is additive.
Here’s what I mean; when musicians are shopping around for a studio, it’s common for the engineer to mention that such-and-such gear was used by such-and-such artist. They do this because it works; people love to hear it. There’s a mythology around famous gear that usually sounds like this: If you sing through Sinatra’s mic, you’ll sound like Sinatra. If you’re mixing through a Neve, you’ll sound like Steely Dan. It might not be explicit, but it’s often implied that the sound comes from the gear. Selling a studio based on its gear is a problem unto itself, but this all stems from the idea that recording is additive; that every piece of gear you record through is going to add something to the sound until your music comes out the other end sounding like a finished product.
But it’s actually the opposite. The microphone, the first item in the signal chain, is essentially a filter. It’s rolling off the frequencies at both ends of the audible spectrum, and adding resonance and noise. The next item is the microphone preamp; a “clean” preamp is going to do its best to preserve all the information in the original signal, while a “colored” preamp is going to lose some information, usually transients & high frequencies. If you’re tracking through a compressor, you’re decreasing dynamic range. If you’re recording to tape, you’re adding noise, losing more transient impact, and further reducing the frequency range. If you’re recording to digital, you’ll need high-quality conversion to translate the analog signal without degradation. Continue reading “Digital Tape: Gear is Not Additive”