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GEQgen Creates StudioLive Graphic EQ Presets Offline

GEQgen is a web application for editing PreSonus StudioLive GEQ presets offline.

I made a web application called GEQgen (short for Graphic EQualizer generator, pronounced: “geek-jin”). It was designed for easy creation of GEQ presets that the first generation PreSonus StudioLive audio mixing consoles read/write/share within the original Universal Control software.

screenshot of GEQgen graph and input fields

GEQgen provides a visual graph for reference.

The older Universal Control software (not the newer UC AI version, which only works with StudioLive AI devices) permits editing only when a StudioLive device is connected. The dB values of the 31-band EQ can only be adjusted by clicking and dragging the sliders, which is kind of tedious.

screenshot of original Universal Control software splash screen

Universal Control requires a StudioLive console to be connected to the computer in order to function properly.

GEQgen allows offline creation of GEQ presets (convenience!) and for the dB values to be typed in or incremented up and down with the arrow keys. The result is plain text formatted in valid XML that can be saved as a preset and uploaded to first generation StudioLive mixing consoles.

screenshot of XML code

GEQgen outputs valid XML which can be saved as a GEQ preset.

Why does this matter? Well, sometimes I like to create “flattened” GEQ presets based on the frequency response graph that manufacturers provide with their products. Having a flatter EQ response means that the output of various mains speakers, monitor wedges, and headphones are more consistent with each other. Doing this task was tough in the old Universal Control software. With this new GEQgen tool I can simply look at the graphs, guesstimate the values, and type in what I want. It’s much faster and easier.

screenshot of many frequency response graphs

Graphs like these can be used as reference to create GEQ presets which can flatten the response of loudspeaker output.

Maybe you will find this tool useful. I’ve posted it on a new Tools page here on my site. I suspect I will be making more things like this in the future. Let me know what you think.

Also, if you like coding for the web, maybe check out GEQgen on Github. Thanks!

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iPhone Rolling Shutter Captures Guitar String Oscillations

This is cool. My inner nerd had to come out and dance for bit. This is video by Kyle Jones, a designer, animator and illustrator from Nashville. Check out his website here and follow him on Twitter. He decided to record himself playing guitar using his iPhone from inside the guitar. Genius. Rejoice with me, […]

This is cool. My inner nerd had to come out and dance for bit. This is video by Kyle Jones, a designer, animator and illustrator from Nashville. Check out his website here and follow him on Twitter. He decided to record himself playing guitar using his iPhone from inside the guitar. Genius. Rejoice with me, all you audio and science loving geeks.

If you want to know why this strange wiggly string phenomenon happened, ask my cousin Chris Whonsetler, the photographer behind the beautiful images found on WhonPhoto.com. Here’s his blog entry about rolling shutters.

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Do You Hear What I Hear?

I found some MP3s of sine waves at various frequencies at www.freemosquitoringtone.org. As we age, we lose our ability to hear higher frequencies and so these MP3s are offered as discreet ringtones for teens. Try out these tones and let me know how high you can hear. Audio Frequency Test Tones Don’t worry if you […]

I found some MP3s of sine waves at various frequencies at www.freemosquitoringtone.org. As we age, we lose our ability to hear higher frequencies and so these MP3s are offered as discreet ringtones for teens. Try out these tones and let me know how high you can hear.

Audio Frequency Test Tones

Don’t worry if you can’t hear some of the higher pitched test tones. The problem may not be your failing ears. It could be the inability of your speakers, headphones, or soundcard to reproduce the higher tones.
Frequency Age Range Audio File
08.0khz Everyone [audio:8000.mp3]
10.0khz 60 & Younger [audio:10000.mp3]
12.0khz 50 & Younger [audio:12000.mp3]
14.1khz 49 & Younger [audio:14080.mp3]
14.9khz 39 & Younger [audio:14918.mp3]
15.8khz 30 & Younger [audio:15805.mp3]
16.7khz 24 & Younger [audio:16746.mp3]
17.7khz 24 & Younger [audio:17742.mp3]
18.8khz 24 & Younger [audio:18798.mp3]
19.9khz 24 & Younger [audio:19916.mp3]
21.1khz 24 & Younger [audio:21101.mp3]
22.4khz 24 & Younger [audio:22357.mp3]
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