AF’s Weblog

March 2, 2011

Tips for Mixing Rap Vocals

If I had to pick the most frequent question I get asked on a regular basis – it would have to be “how do I mix rap vocals?” Or some variation thereof. At least once a week, if not more often.

I mix a new rap vocal four or five times a week – much more if you count different rappers on the same song. I have developed an approach – sort of a formula to create a formula. In truth, we know that all songs, vocals, captures, and performances are different. There can never be one formula to mix all vocals effectively. And there are many approaches to conceptualizing a vocal treatment – mine is one of many.

The Concept

It all starts with the concept. I say this time and time again, and it only gets more true as I say it – in order to mix anything – you need an end game. There has to be some kind of idea of where the vocal is going to go before you start getting it there. That idea can and probably will change along the way, but there has to be some direction or else why do anything at all.

The big problem most people have with mixing rap vocals is that they think of the word “vocals” without considering the word “rap.” Rap is supremely general – there are big differences between 1994 NY style rap vocals, and 2010 LA style rap vocals.

Now let’s have a listen to some mixing samples…

Processing

Now you have the vocals clean (or maybe they came in clean to begin with). It’s time to decide what to do with them. Now, I can’t write how you should or should not process your vocals, but I can give some insight into things to consider and think about.

Balance

Figuring out the relationship between the vocals and other instruments in the same frequency area is extremely important. Quintessentially, Hip Hop is all about the relationship between the vocals and the drums – and the number one contestant with the voice is the snare. Finding a way to make both the vocals and the snare prominent without stepping on each other will make the rest of the mix fall nicely into place.

In “1nce Again,” you’ll notice that the snare is a little louder than the vocals, and seems to be concentrated into the brighter area of the frequency spectrum, while the vocals are just an inch down, and living more in the mid range. This was a conscious decision made in the mix. But mixes like Loungin’ have the vocals on par with the snare. And Massive Attack has the vocals up – but it’s not really a snare, it’s a percussive instrument holding down the 2 and 4 that lives primarily in the lower mid region.

“Air”

Hip Hop vocals generally do not have much in the way of reverb. There are three reason for this primarily. 1) Rap vocals tend to move faster and hold more of a rhythmic function than sung vocals – and long reverb tails can blur the rhythm and articulation. (2) The idea of Hip Hop is to be “up front and in your face”, where reverb tends to sink things back in the stereo field. (3) Everyone else is mixing their vocals that way. Not a good reason, but kind of true.

 

However, vocals usually do benefit from sense of 3-D sculpting, or “air.” A sense of space around the vocals that make them more lively and vivid. Very short, wide, quiet reverb can really do the trick here. Another good thing to try is using delay (echo) – and pushing the delay way in the background, with a lot of high end rolled off of it. This creates the sense of a very deep three dimensional space, which by contrast makes the vocal seem even more forward. Lastly, if you are in a good tracking situation, carefully bringing out the natural space of the tracking room can be a good way to get super dry vocals with a sense of air around them. Compression with a very slow attack, and relatively quick release, and a boost to the super-treble range can often bring out the natural air.

Shape & Consistency

A little compression is often nice on vocals, just to sit them into a mix and add a little tone. On a sparse mix, a little dab’ll do ya. The most common mistake people make when processing vocals for Hip Hop is to over-compress. High levels of compression is really only beneficial to a mix when there is a lot of stuff fighting for sonic space. When you read about rapper’s vocals going through four compressors and really getting squeezed it’s probably because there are tons of things already going on in the mix, and the compression is necessary for the vocals to cut through. Or because it’s a stylistic choice to really crunch the vocals.

Filtering

What’s going on around the voice is just as important to the vocals as the vocals themselves. Carefully picking what to get rid of to help the vocals along is very important. For example, most engineers hi-pass filter almost everything except the kick and bass. That clears up room for the low information. But often the importance of low-pass filtering is overlooked. Synths, even bass synths, can have a lot of high end information that is just not necessary to the mix and leave the “air” range around the vocals feeling choked. A couple of well placed low-passes could very well bring your vocals to life.

 

Also, back to the subject of hi-passing, unless you are doing the heavy handed Bob Power thing, you really don’t need to be hard hi-passing your vocals at 120hz. The human voice, male and female, has chest resonance that goes down to 80hz (and even under sometimes). Try a gentle hi-pass at around 70 or 80hz to start with if you’re clearing up the vocals. Or maybe no hi-pass at all…

Presence

Deciding where the vocal lives frequency wise is important. Mid sounding, “telephonic” vocals can be cool at times, low mid “warm” sounding vocals certainly have their place. Commonly, the practice is to hype the natural presence of the vocals by getting rid of the “throat” tones and proximity build up which generally live around the 250-600hz range (but don’t mix by numbers, listen listen listen). This in turn exaggerates the chest sound, and the head sound – particularly the sounds that form at the front of the mouth, tongue, and teeth – these are the tones that we use to pronounce our words and generally live in the upper midrange (2k-5k, no numbers, listen listen listen).

I think that about covers the basics of what to listen for when working your vocals.

To read the full detailed article with sound samples visit:  Mixing Rap Vocals

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