Re: data resampling (=?UTF-8?B?UGF3ZcWCIEt1xZttaWVyZWs=?= )

Subject: Re: data resampling
From:    =?UTF-8?B?UGF3ZcWCIEt1xZttaWVyZWs=?=  <pawel.kusmierek@xxxxxxxx>
Date:    Fri, 15 Aug 2014 08:35:49 -0400
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

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On 15 August 2014 03:26, Alain de Cheveigne <alain.de.cheveigne@xxxxxxxx>
wrote:

> Hi Hari,
>
> Note that matlab's resample() has inadequate antialiasing.
>

I recently submitted results of matlab's resample to the SRC comparison
website http://src.infinitewave.ca/
By their graphs the signal at -6dB at Nyquist and the filter is very
shallow. Check out "Sweep" and "Transition" and compare, for example, to
Adobe Audition 5.5 and CS 6.

Thanks to that shallow filtering, there is (of course) very little ringing
in the "Impulse" measurement though.

>It's an example of matlab's tendency to have lots of different functions
for a similar purpose, each limited or buggy in a different way (see
http://abandonmatlab.wordpress.com/2012/08/07/matlab-cant-read-plain-text-data-out-of-a-wet-paper-bag/
for an enlighening rant).

Nice one. Now there is yet another way to read a text file: readtable.

Pawel

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On 15 August 2014 03:26, Alain de Cheveigne <span dir=3D"ltr">&lt;<=
a href=3D"mailto:alain.de.cheveigne@xxxxxxxx" target=3D"_blank">alain.de.chev=
eigne@xxxxxxxx</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;padding=
-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-l=
eft-style:solid">Hi Hari,<br>
<br>
Note that matlab&#39;s resample() has inadequate antialiasing. <br></blockq=
uote><div><br></div><div>I recently submitted results of matlab&#39;s resam=
ple to the SRC comparison website <a href=3D"http://src.infinitewave.ca/">h=
ttp://src.infinitewave.ca/</a></div>

<div>By their graphs the signal at -6dB at Nyquist and the filter is very s=
hallow. Check out &quot;Sweep&quot; and &quot;Transition&quot; and compare,=
 for example, to Adobe Audition 5.5 and CS 6.</div><div><br></div><div>

Thanks to that shallow filtering, there is (of course) very little ringing =
in the &quot;Impulse&quot; measurement though.</div><div><br></div><div>&gt=
;It&#39;s an example of matlab&#39;s tendency to have lots of different fun=
ctions for a similar purpose, each limited or buggy in a different way (see=
 <a href=3D"http://abandonmatlab.wordpress.com/2012/08/07/matlab-cant-read-=
plain-text-data-out-of-a-wet-paper-bag/" target=3D"_blank">http://abandonma=
tlab.wordpress.com/2012/08/07/matlab-cant-read-plain-text-data-out-of-a-wet=
-paper-bag/</a> for an enlighening rant).</div>

<div><br></div><div>Nice one. Now there is yet another way to read a text f=
ile: readtable.</div><div><br></div><div>Pawel</div><div><br></div></div></=
div></div>

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