Pro Mixing Series: Episode two: The Haas Effect
For some of us this may be a very mysterious image: “panning” presets in a delay device of a sequencer DAW…
Well it IS a mysterious image until you check this article about the Haas effect.
Have you ever been so frustrated with a mix that doesn’t have life, wide stereo image and airy, “natural” space? Are you not getting enough depth in your mix? Have you added so much stereo reverb to add “space” to your mix that you end hating what you have done? Well… I have…
It is truly horrible getting every track in a mix sounding so “mono” after panning left and right different lines or instruments. It feels truly like there is something in the way from the original tracking to your final mix. The panning of some tracks helps very much to make a clear mix but sometimes that is just not enough to make things clear and certainly deeper, spacious, open and rich-sounding.
There is a solution to this lack of depth: The Haas Effect . It can take a simple mono instrumental or vocal line and give it presence or take it to the back of the mix, depending on how you use it and what other effects you add to the chain.
Basically, what you are doing with the Haas effect is making the listener’s brain to interpret the sound coming from a certain direction and angle in a way that is more natural to the ear than a simple panning adjustment. The Haas effect takes full advantage on the fact that we have TWO ears.
In real life, when a sound comes from the left it is received by the left ear BEFORE the right ear, so the brain interprets this difference as “a sound coming from the left”. The interpretation depends on how long is the delay between the two ears the less the delay, the more centered is the sound. This very short delay can be interpreted as a phase shift because the sound reaches first one ear and then the other. So, when there is no phase shift, no delay between the two perceived signals together are interpreted as dead center, with no panning at all.
We CAN use this psychoacoustic effect (the Haas effect) to print more depth and directionality into our mixes without even moving the panning control of the console! That’s why I put the snapshots from Ableton’s Simple Delay. You can make your own Haas effect presets in any delay that permits very, really shot delay times and also inserting a time shift between the two channels. The Haas effect is performed delaying one of the two channels (left or right) just a little bit, from a couple of samples to no more than 30 milliseconds (more in depth scientific info in the article from Wikipedia referenced above); the channel that reaches our ear first is the one that dictates where is the sound “coming from”, the later channel is interpreted as the natural tail of the sound.




I keep a collection of audio samples designed to help check my monitor setup. Test tones, essentially, that I use after I’ve moved my speakers or desk, to ensure the speakers still behave as they should.
In the techno beat live set provided above, you’ll find several samples:
You should see a grid of 16 squares in the new Drum Rack. Navigate your samples directory with one of the File Browsers, and drag your drum samples into the grid squares. Note: you can select multiple samples and drag them into the drum rack at once, they will be automatically placed in order. 




These days, I’ve been hearing a lot of criticism aimed at the compact disc format. Vinyl is regaining popularity as people are realizing that CD’s just don’t sound the same as vinyl. Now, whether this is just a placebo effect, I’m not sure. Apparently, 


Here at emusictips, I’m always on the lookout for fresh new electronic sounds. Artists such as 

Here’s how to do it in Reason: Create an ECF-42 filter unit, and wire your mixer through the filter into the audio interface. Right click (Ctrl + click for mac) on the device and choose Create Sequencer Track for name of device. When your track is playing, hit record and turn up the FREQ knob to make it sound like you’re going back into the club. Try experimenting with the modes on the filter. BP 12 means band-pass filter. It allows only frequencies a bit lower and a bit higher than the frequency specified by the cutoff point (FREQ knob). The “angle” at which frequency amplitudes drop off is 12dB per octave. The LP filter has two modes: 12 and 24 dB per octave. The 24 cuts off frequencies above the cutoff point much more dramatically then the 12. The 12 leaks more high frequencies than the 24.
If you think of a song as an arrangement of layers of audio, then it makes most sense to begin a track with one or two layers. Instead of jumping right into a beat, it helps to ease the listener into the song. The intro gives the listener an idea of what the rest of the song will be like. It sets the mood, and at raves or other dance parties, it gives dancers a chance to catch their breath and rest for a bit.
In Reason, put a delay device on any drum beat or instrument. Create an automation track for it. Then, make sure that the track’s record toggle button is on. Hit record, and go wild with changing the delay time (the box with numbers in it), feedback, delay unit (ms or steps), etc. If done right, you get a crazy effect because a non-fixed delay time has to compensate for the change by fluctuating the pitch, it’s really weird sounding. Try it!
Here’s
After hours of listening to the same track over and over, your ears will probably get exhausted. You will begin to lose your ability to mix the track properly. Take a break from your mix if you can. Sleep on it, and come back to it a day or two later. I guarantee you will hear things or notice things you wouldn’t have before. There’s nothing that can help you mix a track quite like distancing yourself from it for a while.


This involves drawing many sequential ON and OFFs in your volume automation. For an example of this technique, listen to this example from “outer shpongolia” by shpongle. In Reason, there is really simple way to achieve this effect with the matrix pattern sequencer.
One of the most popular reverse hits is a reverse cymbal. You hear it all the time in pop or techno songs. The reverse cymbal crash leads to the next bar. It works well as a buildup and transition. To make your own reverse hit, try taking a nice loud percussive sound that hits and then gets quieter from there on out. Then in any sound editor such as 

If you don’t want your hi-hat track to sound mechanical and lifeless, then you need to vary your patterns. This can be done with a few different tricks. First, alter the note velocities to create accents as seen in the left image. A good starting point is accenting the first of every three or four hits. Make the velocity on these hits higher than all the other hits. Second, set the hi-hat’s volume envelope to the following settings (and as seen in the right image). Attack = 0, Decay = just above 0, Sustain = 0, Release = 0. Now you can automate the decay time to make the hi-hat hit shorter or longer. This emulates the sound of a hi-hat being closed tighter or looser.