MIXING & EFFECTS
This section explains how to use the tools at your disposal to create a good mix. Often we see new producers mixing and mastering at the same time, getting confused and ending up with disappointing results. Similarly, we observe many on never-ending search for 'mastering' plugins that will magically make mixes sound 'professional'. Be assured, everything you need to make a professional sounding mix is provided with the stock FL Studio installation. The rest can be achieved with some practice and by trusting your ears. In this section we'll consider:
How to accurately set the levels of your final mix.
FL studio has a Main volume, in the menu bar AND a Master Track Volume . To ensure the Master mixer track level is an accurate reflection of the final output:
If you are paying particularly close (and possibly unhealthy) attention to the output levels of Samples playing from Sampler Channels, you may notice they are a few dB down on their level when played as Audio Clips in the Playlist. There are three reasons for this:
So together the default load state for a Channel Sampler can be about 8.2 dB lower than the samples actual recorded level. If you absolutely need a sample to render at its recorded level, load it as an Audio Clip by dropping your samples on the Playlist (these default to 100% volume, 0 dB). Finally, make sure the Master and Main volumes (described above) are set to 0 dB and don't forget the effect of note velocity on playback level.
When making the final mix, the goal is often to get the peaks of the loudest sections of the mix close to the maximum possible level, 0 dB, without clipping, that is, going over 0 dB. Clipping happens when a waveform carried inside audio equipment (analog or digital) becomes louder than the maximum level that can be reproduced. The peaks slam into the upper/lower limits and have nowhere to go. A clipped waveform looks like the peaks have been 'clipped' off, as shown in the picture lower left. While occasional transient clipping is not usually a problem, severe and sustained clipping will distort and crackle ruining the mix. Render audio in that state, and there is usually no way to fix the problem. The Edison Noise Removal Tool does have a Declipper Function, but this will work successfully only with mild clipping issues.
The 0 dB reference level marks the loudest sound a digital audio file can make OR your audio interface D/A converter can produce, before clipping starts. The Peak meters in FL Studio turn orange to attract your attention when the signals exceed 0 dB (see above). However, not all signals over 0 dB are bad.
Audio inside FL Studio is digital, and is (at least) represented as 32-Bit floating point numbers. As with all digital audio formats, the number gets bigger as the signal gets louder. Crucially, 32 bit numbers can represent a maximum value that is about 65,000 times greater than a 16 Bit audio CD or .mp3. In other words, a dynamic range over 1600 dB. This is why internal audio, carried on the insert mixer tracks, is not going to run out of headroom under any practical circumstance, and why you should not obsess if they peak over 0 dB. Of course, for practical reasons, you generally want to keep the peaks in the visible range of the meter. On the other hand, when the mix is sent to the outputs of your audio interface, or is rendered to a fixed bit-depth (e.g. 16 or 24-Bit), then clipping can happen and you do care about peaks over 0 dB, for the Master Mixer track.
The Master Mixer track is usually the output to the 'physical world' so you should not let it peak over 0 dB. You can think of the Master fader as rescaling the combined output of all the tracks routed to it. The Insert Mixer track meters are merely guides to the relative volumes in each track. Of course, if you have routed any Input Mixer tracks directly to your audio interface outputs OR you are rendering mixer tracks to disk (at less then 32 Bit float), then these too become 'real world' meters and must not peak over 0 dB.
NOTE: 0 dB peaking is not a 'requirement'. You don't need to set all your tracks to push the 0 dB limit. Recorded sounds, in particular, may peak at -12 dB (or less), and there is nothing wrong with that. However, some times you do want the mix to be loud, the next section discusses techniques for making a mix that's both loud and good.
Mixing is the process of setting the levels of your instruments and effects so all elements can be heard and sound 'good' together. Mixing primarily uses level, panning, equalization and possibly compression on a track-by-track basis. If you can't get the track to sound good at this stage it may be you are using the wrong sounds together or too many of them. Mixing is different from 'mastering', where your goal is to tweak the mix to sound both good and loud. 'Loud' will be defined by the context in which the track will be used and the genre it's from. Mastering primarily uses equalization, multi-band compression and or limiting on the Master mix (Master Mixer track). It's not a good idea to both mix and master at the same time. Concentrate FIRST on making a good mix. THEN work on mastering it. To slip in a carpentry example, first build a comfortable and well constructed chair (mixing) then polish it (mastering). No-one expects carpentry lessons in the FL Studio manual, but we deliver!
If you have compared your music to commercial tracks, and thought yours sound quiet or flat, then this section will bring you up to speed on how 'loudness' and 'goodness' are made. Typically new producers diligently adjust the Master and Insert track levels, making sure the Master Peak Meter is just touching 0 dB and everything is as loud as it can go without clipping. But compared to the commercial mixes, tracks still sound quiet and lacking depth. The problem is that the relationship between 'peaks' and loudness isn't a good one. Our perception of loudness is based on an 'average' input over a period between 0.5 to 1 second. Peak meters show the instantaneous moment-by-moment levels so peak meters will be deceiving as a guide to loudness. In response, a number of alternative metering modes have been developed, see Wave Candy Metering, but these won't help you get your tracks any louder, just better represent what you are hearing. To make tracks both loud and good at the same time, experienced producers rely on all or some of the following tools and techniques (See here for Mixing & Production Video Tutorials).
To increase loudness the most effective place to start is Master Limiting, put Fruity Limiter in the last FX slot on the Master Mixer track (it may be there already) and with the default settings, raise the GAIN knob. Experiment with 'too much' and 'too little' Master Limiting and get a feel for what it does to the sound. For more finesse, use moderate compression on the Drum and Bass mixer tracks individually, then a little Limiting on the Master Mixer track. A little here and there, not all at once in the same plugin, or on the same Mixer track. Making loud tracks that also sound great is an art that you will only learn with practice.
A cautionary word. In recent years there has been an 'arms race' between producers to make their tracks louder than the other guys. This has been termed the ' Loudness War'. There is an informative YouTube Video (The Loudness War) that sums it up. Although people are jumping up and down about The Loudness War, it's not necessarily all bad. Certain styles of music (electronic club/dance-music for example) have developed during this war and 'loud' has become part of the sound. On the other hand, acoustic and live instrument recordings can definitely be ruined by over compression, when the natural dynamics (volume changes) are squashed out of existence.
Put simply, dB is a physical scale where adding 6dB, to any value, roughly multiplies the volume by 2. Subtracting 6 dB divides the volume by 2. If you are interested in why this is the case, or why most dB's are listed in the negative, the mathematics of the dB scale as used in audio production is discussed on the 'Calculating dB' page.
These are a list of dB change values that are good and easy to remember that represent the difference in dB between two levels.
A full description is available on the main Mixer page.
NOTE: Most controls are automatable (Right-click and select 'Create automation clip').