Time to think about referencing your tunes. Ever find that when you're getting your own tracks in the mix, or playing them out in a club, somehow they just don't sound quite right when you put them up against released tracks? Even though they sounded fine back at home? You're not alone! Let's dive in and look at how you can make sure you're getting the right balance...When I say 'referencing', I'm going to be talking about two different things; there's listening to your track on different speakers and in different environments, and then there's comparing your track with others.
First though, before you even get to that stage, you should take a break. If you've been mixing down all evening, your ears will have gotten used to the track as it stands; anything you do will likely just make it sound 'wrong'. So go for a walk, listen to some completely different music, watch a bit of TV. Better still, leave it and come back tomorrow. Then, load a bounce of the track into iTunes or Winamp, and sit back. You'll be better able to appreciate what the track is actually doing if you can't see the mixer or the arrange window of your DAW; the brain has a funny way of rationalising everything, and it really helps just to listen to the file in a different program than usual.
Once you're happy with your mixdown so far, then you need to fire up some tunes that you think your track sounds similar to - or that you want it to sound similar to! Make sure you've got the volumes matched up so that they all sound the same level, and flick back and forth to compare the differences in the mix (you might find it's easiest to do this in your DAW so you can mute and unmute channels). There are some obvious things to listen out for, like the basic issues of a mixdown; is your snare much louder or quieter than another track? The vocals? On a more subtle note, you should listen out for the overall balance of the track. It could be that although everything sounds good individually, the higher frequency elements of your track are quieter, relative to the bass - which might mean they don't come through so well in a club. Or vice versa, of course.If yours sounds somehow 'harsher' perhaps, but you can't identify which element is causing it, then it could be that you've been boosting high frequencies on several channels (again, even if they sound fine on their own), and would be well advised to go back in and tweak them.
Pay attention also to whether the other tracks use any cunning techniques with the arrangement - often you'll notice that a track may create space for a vocal by dropping out some lead lines or high frequency percussion; or will program the bassline so that it's not playing at the same time as the kick. This can be a useful way to avoid cluttering the mix, or avoid it sounding 'top heavy' for instance.
Many people find it helpful to use some kind of graphical frequency analyser when mixing down and referencing, and it can certainly help - if you look at one track which seems pretty flat, and yours has a strange spike at a certain frequency, then you may need to consider what is causing it. But equally, you don't necessarily have to go after every little peak in the spectrum - your track has to have some kind of sonic focus after all! You don't want to be mixing all the character out of your beats. And you should always try to trust your ears, rather than what you can see on the screen.
Once you're confident that you've got a balanced and comparable sound, you then need to go and take your new beat, and your reference tracks, and listen to them on other speakers. This is vitally important, as so far you're going to be working around the imperfections of your room and speaker set up. So there could be some issues you've not spotted yet.
If you can, try and listen on a small setup which doesn't have much bass, a bigger system which has plenty, and maybe in the car - car stereos can vary enormously. Some common things to look out for would be the low end - especially on the small system. Can you still hear the presence of the kick or sub on some tiny speakers? At the top end, does your lead or vocal still stand up clearly amongst the tinny rattle of the rest of the track? Is it the same with the released tracks? Similarly, on some boomy speakers, you want to make sure that the low end still has clarity, and doesn't drown out everything around it.It's a bit of a long and often quite boring process, and one that will mean you get through plenty of blank CDs. But it's necessary if you want your tracks to hold up well against the best out there, so get a notepad and pen, and start listening closely. You may find your mixes start to improve quite quickly!
Any producer will know the feeling. You sit down in front of your sequencer, fire up a template, and sit there staring vacantly at the screen, as all the ideas disappear from your head. You're stuck for inspiration. What to do? Here's one angle that could get you moving again...

Sub bass these days is one of the most essential aspects to a dance music track - and now that we have decent sound systems and quality rigs in clubs, it's ever more important to get it right. But what's the best way to do it? And what makes a good sub anyway?
Because sub bass is such an 'extreme' frequency, there are plenty of technical issues that come into play. A lot of them arise from the limitations of vinyl or club systems. You need to remember that as frequencies get lower, the wavelength gets longer; this means a speaker (or needle) has to move twice as far to create the sound, and will need much more power to push all that air. As such, it's a good idea to try and keep your lowest frequencies above about 40Hz, which is around the notes of E1 or F1. Below this, at the kind of volumes dance music requires, it starts getting increasingly difficult to cut to vinyl (the grooves need to be further apart, limiting the length of the track) - and not all club systems can handle the extreme lows anyway. Your author has first hand experience of playing one of his own tracks in a busy club, and finding that it sounded like there was no sub-bass on the track whatsoever. The sub (on the note of D1) was too low for the club system to handle; it sounded terrible!
To return to the subject of harmonics, this is something that can be useful for a number of reasons. You can add a sense of warmth, or 'fatness' by adding in frequencies above the standard sub region - we're talking 150 to 400Hz here - that will give things more of a glow. But, arguably more importantly, they'll help the sub come through on smaller speakers. A radio or an iPod dock will struggle to reproduce frequencies right at the bottom end; not so much of an issue if the top end of your bass is a raging wobble dubstep affair, but if you're writing more of a roller, then it may sounds like there is no bass at all. Get some higher frequencies on your sub and people will be able to hear what it's doing, even if they can't feel the weight. A simple way of doing this is to set up a send to a buss, and then distort it and bandpass filter it around 200 or 300 Hz. This way it will copy the original sound, shouldn't interfere with the low end (as you've high passed it) and will give extra interest for the listener.
With the ongoing love affair between pop, hip-hop and dance music, there has never been a time when the vocal track has been so popular in underground dance music. So read on for some production tips on how to fit a vocal into your own beats...
On a related note, you need to make sure the vocals are crisp and bright; plenty of top on there. This is less essential for backing vocals and harmonies, but in general you need to remember that your lead vocal will be jostling for space amongst the hihats and lead lines; so it needs to have plenty of high frequency content. In addition to vocals you've recorded yourself, I often find that acappellas downloaded from the internet can be recorded from vinyl, and lose some clarity in the process, so even with ready-recorded vocals you might need to add some top back on. Similarly, if you're working in strongly electronic fields, you'll need to compress the vocal fairly heavily. Of course, sometimes you want a natural feel to the track; but in this age of slamming basslines, searing leads, vocoders and overdubs, 'natural' tends to be restricted to Norah Jones records. You need the vocal not just to sit up front, but stay there, so get that compressor fired up. Fast attacks, medium release, hard knee, taking off anything up to 10 or even 15dB.
Effects can also be used to 'rescue' a vocal somewhat - subtle use of an autotune can correct out of tune singers, chorus can beef up a thin sounding vocal track, and one of the most popular recovery tools is a good de-esser. Use these to cut out sections when your vocalist is overemphasising 'ss' sounds to create a harsh sibilance. A de-esser is essentially a frequency sensitive compressor; and getting good results is rather an inexact science.