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pindrop2
Can Android devices or Windows phones have an EQ app for streaming? Definitely ...
rpell2
I actually considered this (and another plugin called BruteFIR) at one point, ...
Custom EQing headphones for your ears
Rich Pell
1/30/2013 1:06 PM EST
As someone who prefers accuracy in reproduction I have always wished for a more objective approach for achieving it with headphones. Unlike with a loudspeaker/room system, the sound produced in the headphone/ear interface is not only dependent on one's individual auditory canals, it doesn't lend itself to easy measurement and correction.
So I was quite intrigued when, some time back, I ran across Siegfried Linkwitz's webpage on "Reference earphones," where he found that the perceived frequency response of headphones (relative loudness changes determined by sweeping over the frequency range with an audio signal generator) typically exhibited significant - but narrow - peaks, which could vary from person to person.
Linkwitz's suggested solution was a simple passive LCR notch filter circuit - to be placed between a headphone amplifier output and the headphones - designed to achieve a uniform perceived amplitude response for a particular listener and pair of headphones/earphones.
See the complete post about custom EQing headphones on EDN.
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hpyle
1/31/2013 12:26 PM EST
You could do the equalization on the server; for example inguzaudio supports per-client EQ filters, processed using a server plugin.
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rpell2
1/31/2013 3:01 PM EST
I actually considered this (and another plugin called BruteFIR) at one point, and theoretically it sounds like a great idea. But after looking into it a bit more it seemed that the install on a Linux system was rather involved and not fully supported, and while I have worked on Linux systems in the past I really didn't want to take the chance of messing up my Vortexbox.
Even more important, it seemed that my Vortexbox appliance most likely didn't have the required processing power to handle the Inguz processor (2 GHz min needed according to the Inguz documentation). However I just did some further checking (it's been a while since I last researched this) and found at least one claim that it does work. This is something I'll definitely have to check into further. Thanks for the reminder!
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GregB1
1/31/2013 2:26 PM EST
Dump the iOS device and get a real one.
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pindrop2
2/2/2013 2:22 AM EST
Can Android devices or Windows phones have an EQ app for streaming? Definitely keep us posted when iOS can support this capability. I would love to write an app that do that and more.
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