Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit - Page 9 - Car Audio | DiyMobileAudio.com | Car Stereo Forum

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Old 03-24-2016   #201
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Well in fact you know what, I'd be really curious to see how you "paint" during the measurements. A video w/ or w/o sound would be perfect

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Old 03-27-2016   #202
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Maybe this will help a little to understand how it works:

TDA – Time Domain Analysis software

and video, which I have found on the Russian TDA forum:

https://www.facebook.com/10000190612...type=2&theater

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Old 03-27-2016   #203
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Haha now I understand the look of my neighbor when she saw me last morning when she took out her trash

He seems to do it a bit fast no?

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Old 04-03-2016   #204
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Danley Sound Labs Inc. decided to use APL processing to relieve all beauty and nuances of their loudspeaker’s designs for a show at Prolight & Sound Frankfurt Musikmesse 2016. Come hear that in hall 3.1 (stand J81) and Concert Sound Arena.
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Old 04-03-2016   #205
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Congratulations Raymond!
Will you be there?

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Old 04-03-2016   #206
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

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Congratulations Raymond!
Will you be there?
No this time, sorry : )

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Old 04-04-2016   #207
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Nobody can regreet using the APL technology. It is not so easy, but the results worth trying.

Congratulations anyway, Raimonds.

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Old 04-04-2016   #208
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Congrats Raimonds, I'm sure they will be happy with the results.


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Old 04-15-2016   #209
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Bookmarked for more reading. Fascinating tech.

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Old 04-15-2016   #210
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Quote:
Originally Posted by Hanatsu View Post
Raimonds measured my headphones (AKG Q701) and supplied me the EQ correction for them.





Look at the FR! One might think that a pair of good headphones would have flatter response than this.

Amazing to listen to them with and without the VST active to compare. I guess this could be called "reference sound". Once again, awesome...


Etymotic target FR.

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Old 04-15-2016   #211
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Heh the FR of the headphones are typical, because of the way they are measured in an artificial ear canal. What is "Etymotic" btw?

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Old 04-15-2016   #212
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Etymotic Research | How We Measure Response Accuracy

As they should be! They make my favorite pair of reference in-ear headphones.

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Old 04-15-2016   #213
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Quote:
Originally Posted by cvjoint View Post
Etymotic Research | How We Measure Response Accuracy

As they should be! They make my favorite pair of reference in-ear headphones.
Ah I see, something like this then?



Does sound a little more open in the upper midrange, but ~10dB is way too much. Got pretty harsh sounding at that point. The beauty of the APL workshop is that I can create any curve I want with the correction automatically applied

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Old 04-15-2016   #214
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Quote:
Originally Posted by Hanatsu View Post
Ah I see, something like this then?



Does sound a little more open in the upper midrange, but ~10dB is way too much. Got pretty harsh sounding at that point. The beauty of the APL workshop is that I can create any curve I want with the correction automatically applied
Yep! They claim to have a tuned chamber design that creates that target FR to "build in" what your ear shape would normally create. I don't know if other companies attempt to do the same, or whether they are as successful, but that should be imo the way the target FR should look. I just wish they designed them around my big ole ears.

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Old 04-15-2016   #215
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Quote:
Originally Posted by cvjoint View Post
Yep! They claim to have a tuned chamber design that creates that target FR to "build in" what your ear shape would normally create. I don't know if other companies attempt to do the same, or whether they are as successful, but that should be imo the way the target FR should look. I just wish they designed them around my big ole ears.
Ah cool. I knew about the headphones testing conditions but I've never really read up about how reference headphones should behave. Good to know!

Sounds really good now actually lol...

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Old 04-15-2016   #216
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Quote:
Originally Posted by Hanatsu View Post
Ah cool. I knew about the headphones testing conditions but I've never really read up about how reference headphones should behave. Good to know!

Sounds really good now actually lol...
Yeah, just make sure you apply that target FR to the same type of headphones (in-ear). Once you get hooked on it it's hard to listen to other tunes.

You basically achieved their design with DSP instead of their tuned chamber and at the same time maybe fixed some other irregularities in the basic response of the headphones. Not to mention DSP hugs that target FR more precisely.

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Old 04-15-2016   #217
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Hanatsu do you listen from your pc then?
Would be another good reason to apply the correction on the source here, if played from a portable thing.

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Old 04-16-2016   #218
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

VST plugin, foobar2000. It got no real limitations so if you want you could go crazy with the amount of taps used. If you use JRiver you could do virtual loopback and running measurement sweeps with APL or any convolution engine active to observe results (thanks Wesayso for that tip)...


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Old 04-21-2016   #219
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

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Old 04-21-2016   #220
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Quote:
Originally Posted by Alextaastrup View Post
Maybe this will help a little to understand how it works:

TDA – Time Domain Analysis software

and video, which I have found on the Russian TDA forum:

https://www.facebook.com/10000190612...type=2&theater


I still don't quite get it....



So do we use TDA to set the time delay in our normal DSP, and then use APL Workshop to generate EQ filters that will fix the response?

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Old 04-21-2016   #221
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Generally speaking - yes. But I made Apl EQ first for the both front channels separatelly.

Actually the APL1 is provided by the software, that it able to make some small delays. I use the external DSP for this, as it can be controlled directly from the HU.
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Old 04-21-2016   #222
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Apl will correct the FR and thus the phase response. Pure time delays you need to dial in anyway, theoretically the apl1 supports linear phase so it could correct time delays as well. Right now it does minimum phase correction (which should zero all delay if T/A is set correctly and the response regions actually are MinPh).


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Old 04-30-2016   #223
 
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

I've read this thread, and the TDA thread a few times over the last few months, and I decided today that it's time to get an APL-1...

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Old 04-30-2016   #224
 
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Good to see more people getting these .... more info to be had from others
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Old 04-30-2016   #225
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Default Re: Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit

Great one more!

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