Friday Tips: Studio One's Transient Shaper for Kick and Snare

As with so many aspects of audio, the subject of compression presets polarizes people. The purists say there's no point in having presets, because every signal is different, and the same compressor settings will sound very different on different sources. On the other hand, software comes with presets, and there are plenty of recording blogs on the web that dispense advice about typical preset settings. So who's right?

And as with so many aspects of audio, they all are. If a preset works out of the box, that's just plain luck. However, there are certain ranges of settings that work well in many cases for particular types of signals. In any case, the effects of compression are totally dependent on the input signal level anyway-if the threshold is set to -10, then signals that peak at 0 will sound very different compared to signals that peak at -10.

The most effective way to approach compression is to decide what effect you want the compression to accomplish, then adjust the compression settings accordingly. It's also important to remember that compression isn't just some monolithic effect that squashes things. For example, with kick and snare, compression can act just like a transient/decay shaper due to a drum's rapid decay.

The usual goal for compressing kick is an even sound, yet one that doesn't reduce punch. However, you have a great deal of latitude in deciding how to implement that goal.

Figure 1: A starting point for kick (and snare) compression.

The preset in Fig. 1 uses a fairly high ratio, and hard knee, to even out the highest levels. You want the compression to take hold relatively rapidly, but not take away from the punch. The best option is to start with the attack time at 0, and increase it until you hear the initial hit clearly (but don't go past that point). Because a kick decays fast, release can be fast as well.

For transient shaping, slowing the attack time softens the attack. Raising the ratio increases the sustain somewhat, while making space for the attack (assuming an appropriate attack time). Between the attack and ratio controls, you can pretty much tailor the kick drum's attack and sustain characteristics, as well as even out the overall sound. A higher threshold is another way to emphasize the attack, by letting the decay occur naturally. Lowering the threshold reduces the level difference between the attack and decay.

Snare responds similarly to kick, however with an acoustic drum kit, the kick is more isolated physically than the snare. As a result, compressing the snare has the potential to emphasize leakage. Fortunately, the snare is often the focus of a drum part. As a result, you can simply compress the snare, and accept that leakage is part of the deal. With individual, multitracked drums (including electronic drums) where leakage is not a problem, it's still usually the snare and kick that get compression.

With snare, you may want to use a lower ratio (2:1 - 3:1) for a fuller snare sound. Or, increase the ratio to emphasize the attack more. Again, use the attack time to dial in the desired attack characteristics.

With both kick and snare, you'll usually want a hard knee. However, the knee control is a fantastic way to fine-tune the attack-and once you have that dialed in, you'll be good to go.

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