Posts Tagged ‘technology’

This post is going to be a tutorial on doing mashups using logic pro and some of the tools it has, mainly Flex Time and the ESX24 Sampler. The first thing I want to talk about is house keeping. When you’re doing a mashup, you need every sample or loop to have its own track, sometimes you can make exceptions for loops or samples from the same song, or similar songs, but if you have the power in your computer, I still recommend you put them on different tracks. The reason for this is quite simple, every song is mixed differently, so when doing a mashup of all these different songs, you’re going to have to mix them all differently to get them to work. As well as change their tempo, and their pitch and numerous other things.

As you can see here I’ve put all my samples/loops on different tracks, and some of them have drastically different settings. Now, collecting samples/loops themselves. Some producers will disagree with my here, but I personally find the best way is to just cut the sample in the arrange window, then test it by looping in the sample editor. This picture below shows the cut file selected, causing it to show up in the sample editor, then by clicking the button with the 2 arrows following each other, then clicking the speaker button next to it, you can hear the loop played in loop. Then its just a matter of some careful listening to get your selection perfect.

Next up is speed and beat editing so that you can get your mashup to sound like everything is at the same speed with beats that sync up perfectly. Logic makes this process very simple with its Flex Time tool. Once you have your loop cut, select the tempo you want your mashup to be at, select the sample you want to move into that tempo, and drag the end into the amount of bars the sample goes for. In this case below, its 4.





Now once the tempo syncing is done, sometimes you’ll find that beats aren’t always perfectly on the beat, so you have to move the beat a little, to do this just select a spot in the loop so that these locators come up, then drag the locators left or right to sync the beat.


Now the final technique for getting the mashup to work is by making sure all your loops and samples are in the same key, this is done pretty easily using the pitch shifter, its just move it up or down as much as you need (it takes some practice finding the right keys but once you get the hang of it it’s easy)



Another technique I like to use in mashups or any kind of modern music production is the stutter, this is also just a simple matter of clipping sections out of an audio file in tempo.



There’s one last technique I use in my mashups, this technique is creating a custom sampler instrument in the ESX24 sampler. What I’ve done here is cut each beat out of a synth riff, saved them as a series of audio files, then imported them into the ESX24 (this is done by opening the synth, clicking edit and dragging in the files.)  Then I assigned each of the samples to a note on the keyboard (seen at the bottom of the picture) so that if I played each note in order it would play the riff. This allows you to play the notes in random order and completely reinvent the riff.

To listen to my mashup and hear some of these techniques you find it on soundcloud here.

Hi everyone, I found this great blog today for people who do most of their mixing digitally, like me. As much as I like the sound of analogue gear in many cases, digital mixing is simpler, faster, and best of all, cheaper. This site has some awesome info on VST plugins and what they’re mixing qualities are like. Definitely worth checking out.

My dad bought this old Holden ute for us to bush bash around in at our farm. But me and my quest for experience couldn’t see this as anything less than a perfect opportunity to get some car audio experience, before this all I’d done is put a new head unit in my own car which was a simple remove dash, pull out old unit, cut off wires and attach wires for new unit job.

The ute however, started like this:

It didn’t matter how hard I tried, I just couldn’t get the Bluetooth working! And the fact that the speakers had been removed from the doors didn’t help either.

So I decided everything needed to be replaced. I went down to Jaycar and picked up a cheap head unit with radio and MP3 input and a pair of 6″ drivers to work with.

First part of the job was to remove the old unit. This required tedious screw removal from the glove box and under side of the dash to get it off, and eventually I figured out to get the unit itself out I had to unscrew the knobs on either side. After that I decided to just cut all the wires as it would be safer and easier to redo it.

To make things more difficult this units hole was smaller than the new unit. So after some awkward angle grinding, eventually I got the size to what was needed, and inserted the head unit frame.

Next was the speakers, this was a pretty simple put them in the hole and screw them in process, then I ran the wires through the doors, behind the floor mat and around to where the unit was.

Then comes the fun part, wiring. First I wired up the positives and negatives for the 2 speakers to get them out of the way, then I could concentrate on the power. My original plan was to wire both the ACC and the Battery wires straight to the car battery, but a friend of my dads showed me I could wire it straight into the fuse box. We tested what fuses were there to find one that would give constant power without a key in the ignition and one that would only give power when the key was on accessory, which meant I could set it up like a normal car head unit! So we pulled out the 2 fuses and stuffed the end of the Battery wire under the fuse without the constant stream and the accessory wire under the one with the constant stream.

*Blue – Battery Wire

*Red – Accessory Wire

Then all that was left to do was tape up the wires to the wires coming out of the attachment for the back of the uni…

Plug the attachment into the unit, plug in the antenna cable, slide the unit into the frame and put the underside of the dash back on!

And that was my super old car audio makeover!

Audio technology magazine posted this on facebook, found it rather humorous.

Build a Triffusor

Materials (per triffusor):

  • 2x equilaterally triangular pieces of MDF wood
  • 2x rectangular pieces of MDF wood (width same as trianglar side)
  • 1x rectangular piece of MDF wood slightly shorter and thinner than other pieces
  • Acoustic foam rectangle the size of the 2 larger pieces of MDF wood
  • 5 long thin pieces of any kind of wood to be placed on one side for diffusion
  • A decent number of screws and some PVA glue (and some contact glue, though PVA will work)
  • Saw(s) and miter box (if cutting any of the wood yourself)
  • (Optional) beading for the edges


Attached larger pieces of MDF wood to two sides of one of the triangle. PVA glued, and then screwed them together.  Attached other triangle to other end of the rectangular MDF wood in the same way.

Used contact glue to attach acoustic foam to one side of the triangular prism.

Put smaller wood rectangle where third side of triangle would go and push it in so that it sits further back than the other sides.

Place long thin strips of wood against the side with the deeper wall and glue

Acoustic Properties:

–       Reflective side: The reflective side is smooth wood, allowing the sound to bounce off easily, creating direct reflections.

–       Absorptive side: The side with the acoustic foam is designed to absorb sound. When the sound hits the acoustic foam it enters any tiny gaps in the foam and bounces around inside it so many times that barely any of the sound manages to get reflected, most of it dies within the foam.

–       Diffusive side: The side with the further back wood and strips of thin wood running up and down it is designed to diffuse any sound that hits it. Either before or after the sound hits the back panel, much of it will reflect off the strips causing it to be reflecting off to the sides, known as being ‘diffused’, often used to stop early reflections from causing phase cancelation without killing the reflections all together and risking deadening the room too much.

Personal Uses:

  1. In parts of my room there are cupboards and dressers that would cause unusual reflections, reflective side could be placed in front of these to give more direct reflections.
  2. Diffusive or absorptive side could be placed at the back of my room where the first direct reflections would occur to send them in different directions of absorb them to reduce possible comb filtering in the listening position.
  3. Absorptive side could be placed facing out of the corners and be used as a bass trap.

Evaluation: Overall, each of the triffusor’s sides has the acoustic properties they were designed to have, and the triffusor itself is very sturdy and solid. If building more, the only thing I would do differently is take more time perfecting some of the measurements in attempt to get that really neat and tidy, professional look.

Setup and Recording:

Guitar and bass: The guitar and bass were both recorded using an Axe FX pre-amp, running into Helix board 18 fire wire digital mixer set up with a recording track in logic. The tone/virtual amp setup for the guitar was an off axis miking of a virtual Recto Orange amp. The bass was run through the Axe FX and into the mixer as a direct signal.

Drums: The drums were programmed with MIDI using Superior Drummer software.

Synths: The synths were programmed with MIDI using the Nexus plugin.

Voice: All vocals were recorded in a small room with little treatment using an AKG Perception 220 running into a DI interface, into a recording track in logic. A pop filter was used and singer/vocalist stood a few inches away from pop filter with that a few inches from the mic.

Processing and Effects:

Guitar: The 2 guitar parts were panned hard left and hard right. Both being processed with CLA Guitar plugins from waves, to add a little reverb, compression and EQ colour, some frequencies were then EQed out separately. Intro riff was notch EQed for effect.

Bass: The bass was EQed with a high roll off and some mids cut out, then compressed lightly.

Synths: Synths were given some Drastic EQ dips, peaks and roll offs to help stop masking. Delay and reverb were applied in the plugin whilst creating the sound.

Drums: In the plugin: Kick and snare were EQed and compressed. The toms were noise gated and compressed, some were also filtered. All drums except overheads and hats were bussed to a separate channel and given parallel compression. This bus was then sent to the main out with everything else at a lower level to add an intense thickness to the sound. Drums were all panned to the appropriate places to where a drummer would be sitting. Out of the plugin (aka the drums as a group:) Multipression to compress upper mids was applied, as well as a limiter at a low threshold to keep from peaking.

Vocals: All sung vocals were given a tight reverb, relatively strong compression, some stereo widening (particularly on the harmonies) and some EQ for colouring. Often harmonies were pushed down in volume to keep them from masking the main melody. Screamed vocals were triple tracked, EQed, had reverb applied, and compressed slightly. One track was panned half left, one half right, and one widened to maximum.

Checked phase correlation using a correlation meter plugin and frequency spectrum using a multimeter plugin.

Mastering: Mastering was done using iZotope Ozone 4. In the paragraphic equalizer some lower mids were cut, as well as some of the highs, as there was a lot of hiss. A limiter was added with a -4.2dB threshold to really improve the loudness of the track. A harmonic exciter was added to enhance the higher frequencies in particular. A multipressor was used to compress all the frequencies with slightly different amounts, as the mix needed it to help translate to other speakers in my house, crossovers were set at 80Hz, 324Hz and 5.05kHz. A multiband stereo imager was used to centre all frequencies below 80Hz a little and widen all frequencies above 5.05kHz quite a lot.

IZotope Ozone 4 also has a built in correlation meter, level meters and phase monitoring allowing keeping tabs on phase cancelation and peaking. Mix was converted  to mono to listen, however, just to be sure.