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Interesting Papers re temporal resolution
ncdrawl
post Jul 25 2009, 07:27
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http://www.physics.sc.edu/kunchur/Acoustics-papers.htm

http://www.physics.sc.edu/kunchur/papers/FAQs.pdf
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Canar
post Jul 28 2009, 03:51
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Now the WAV files won't load in foobar2000... unsure.gif

Edit: Hacked around with them, got them loading in foobar2000, but all of them have subharmonics well under 7000Hz. At first I thought I was just hearing some weird IMD, but the subharmonics are there.

Edit 2: Synthesized my own versions, using Axon's cited additive synthesis technique:
http://benjamincook.ca/441.wav - 44.1kHz square, harmonics at 7k (gain 1) and 21k (gain 1/3).
http://benjamincook.ca/192-441.wav - 44.1kHz square, harmonics at 7k (gain 1) and 22k (gain 1/3), resampled to 192kHz using sox 441.wav 192-441.wav rate -v 192000
http://benjamincook.ca/192.wav - 192kHz square, harmonics at 7k (gain 1), 21k (gain 1/3), 35k (gain 1/5), ..., 91k (gain 1/13)

These really don't look square in any editor, but they should be mathematically-acceptable. smile.gif I really can't ABX these. It hurts my ears, and I don't have a DAC that handles 192kHz nicely.

Edit 3: For the curious, this is simply the <math.h> sin function, at 32-bit floating-point precision. Fixed some numbers in Edit 2.

This post has been edited by Canar: Jul 28 2009, 05:17


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- ncdrawl   Interesting Papers re temporal resolution   Jul 25 2009, 07:27
- - rpp3po   I'm not sure wether they have actually tested ...   Jul 25 2009, 13:17
- - Ethan Winer   Nice to see this topic here where it can be discus...   Jul 25 2009, 18:26
- - hellokeith   from the link: QUOTE Our recent behavioral studies...   Jul 25 2009, 20:39
|- - C.R.Helmrich   QUOTE (hellokeith @ Jul 25 2009, 21:39) D...   Jul 25 2009, 22:09
||- - rpp3po   QUOTE (C.R.Helmrich @ Jul 25 2009, 23:09)...   Jul 25 2009, 22:28
||- - Woodinville   QUOTE (rpp3po @ Jul 25 2009, 14:28) Well,...   Jul 28 2009, 09:27
|- - John_Siau   From the first paragraph at: www.physics.sc.edu/ku...   Jul 31 2009, 19:16
|- - andy_c   QUOTE (John_Siau @ Jul 31 2009, 12:16) Th...   Jul 31 2009, 21:30
- - hellokeith   Well after reading through the first 3 PDF's a...   Jul 26 2009, 01:24
- - Axon   Don't even bother using a square wave generato...   Jul 28 2009, 02:55
|- - rpp3po   Yes, I asked myself why Adobe would even include s...   Jul 28 2009, 03:06
- - Mike Giacomelli   I only skimmed the paper, but IIRC tried a digital...   Jul 28 2009, 03:31
- - Canar   Now the WAV files won't load in foobar2000... ...   Jul 28 2009, 03:51
|- - rpp3po   QUOTE (Canar @ Jul 28 2009, 04:51) These ...   Jul 28 2009, 11:37
|- - lvqcl   QUOTE (rpp3po @ Jul 28 2009, 14:37) Could...   Jul 28 2009, 12:52
|- - Mike Giacomelli   QUOTE (rpp3po @ Jul 28 2009, 06:37) Could...   Jul 28 2009, 15:58
- - Nick.C   Why not just just create a 7.35kHz square wave ...   Jul 28 2009, 13:13
|- - benski   QUOTE (Nick.C @ Jul 28 2009, 08:13) Why n...   Jul 31 2009, 15:39
|- - 2Bdecided   QUOTE (benski @ Jul 31 2009, 15:39) QUOTE...   Jul 31 2009, 16:33
|- - benski   QUOTE (2Bdecided @ Jul 31 2009, 11:33) QU...   Jul 31 2009, 16:39
- - Axon   Because that places unacceptable restrictions on t...   Jul 28 2009, 16:12
- - Canar   If I may grossly oversimplify your argument Axon, ...   Jul 28 2009, 19:46
|- - Axon   QUOTE (Canar @ Jul 28 2009, 13:46) If I m...   Jul 28 2009, 20:14
||- - andy_c   I'd like to add a few comments regarding the ...   Jul 29 2009, 16:52
||- - Axon   QUOTE (andy_c @ Jul 29 2009, 10:52) I...   Jul 29 2009, 17:11
||- - andy_c   QUOTE (Axon @ Jul 29 2009, 10:11) Well, g...   Jul 29 2009, 17:27
|- - Mike Giacomelli   QUOTE (Canar @ Jul 28 2009, 14:46) As an ...   Jul 28 2009, 21:08
|- - NullC   QUOTE (Mike Giacomelli @ Jul 28 2009, 12...   Jul 29 2009, 05:48
|- - Mike Giacomelli   QUOTE (NullC @ Jul 29 2009, 00:48) QUOTE ...   Jul 29 2009, 16:19
- - Axon   So, on that note.... an off topic comment. I just ...   Jul 29 2009, 17:01
|- - Canar   QUOTE (Axon @ Jul 29 2009, 09:01) So, on ...   Jul 29 2009, 18:18
- - krabapple   It may well be that Dr. Kunchur's audio work i...   Jul 29 2009, 17:04
- - kode54   Where did you come up with that 1.45GHz figure? Th...   Jul 29 2009, 20:22
- - Axon   Well, I'm thinking more specifically of the th...   Jul 29 2009, 20:41
- - Audible!   QUOTE (ncdrawl @ Jul 30 2009, 23:07) QUOT...   Jul 31 2009, 08:36
- - 2Bdecided   Yes, I see it now (having tried it!), it's...   Jul 31 2009, 17:13
- - John_Siau   From the summary paragraph in "Audibility of ...   Jul 31 2009, 19:37
|- - Axon   QUOTE (John_Siau @ Jul 31 2009, 13:37) Fr...   Jul 31 2009, 21:28
|- - John_Siau   QUOTE (Axon @ Jul 31 2009, 16:28) That se...   Jul 31 2009, 22:15
|- - WernerO   QUOTE (Axon @ Jul 31 2009, 21:28) Dr. Kun...   Aug 1 2009, 06:46
|- - 2Bdecided   QUOTE (Axon @ Jul 31 2009, 21:28) That se...   Aug 1 2009, 08:24
|- - rpp3po   I'm just coming back from vacation. Thanks for...   Aug 2 2009, 17:42
|- - Arnold B. Krueger   QUOTE (rpp3po @ Aug 2 2009, 12:42) But un...   Aug 3 2009, 01:24
|- - rpp3po   QUOTE (Arnold B. Krueger @ Aug 3 2009, 02...   Aug 3 2009, 01:42
|- - ncdrawl   QUOTE (rpp3po @ Aug 2 2009, 20:42) QUOTE ...   Aug 3 2009, 04:59
|- - krabapple   QUOTE (ncdrawl @ Aug 2 2009, 23:59) QUOTE...   Aug 3 2009, 07:57
|- - WernerO   QUOTE (ncdrawl @ Aug 3 2009, 04:59) Dr. K...   Aug 3 2009, 08:52
||- - Axon   QUOTE (WernerO @ Aug 3 2009, 02:52) QUOTE...   Aug 3 2009, 19:02
|||- - honestguv   QUOTE (Axon @ Aug 3 2009, 20:02) BTW, I f...   Aug 3 2009, 19:35
||- - ncdrawl   QUOTE (WernerO @ Aug 3 2009, 03:52) we do...   Aug 8 2009, 00:03
|- - honestguv   > Dr. Kunchur will be posting confutations in f...   Aug 3 2009, 08:54
|- - andy_c   Regarding my earlier post about the lack of second...   Aug 3 2009, 17:34
- - benski   I need to do further reading to do a full refutati...   Aug 3 2009, 20:10
|- - benski   Also, for his FAQ example of two peaks separated b...   Aug 3 2009, 20:24
|- - WernerO   QUOTE (benski @ Aug 3 2009, 21:24) two pe...   Aug 3 2009, 20:56
||- - Axon   QUOTE (WernerO @ Aug 3 2009, 14:56) QUOTE...   Aug 3 2009, 21:04
||- - benski   QUOTE (WernerO @ Aug 3 2009, 15:56) QUOTE...   Aug 3 2009, 21:22
|||- - WernerO   QUOTE (benski @ Aug 3 2009, 22:22) Please...   Aug 4 2009, 08:11
|||- - benski   QUOTE (WernerO @ Aug 4 2009, 03:11) QUOTE...   Aug 4 2009, 14:34
||- - honestguv   QUOTE (WernerO @ Aug 3 2009, 21:56) But t...   Aug 3 2009, 21:47
||- - benski   QUOTE (honestguv @ Aug 3 2009, 16:47) QUO...   Aug 3 2009, 22:04
||- - honestguv   QUOTE (benski @ Aug 3 2009, 23:04) They a...   Aug 3 2009, 22:49
|- - 2Bdecided   QUOTE (benski @ Aug 3 2009, 20:24) Also, ...   Aug 3 2009, 22:05
- - Canar   I just had a random thought about this and I wante...   Aug 4 2009, 02:41
|- - andy_c   Well, the 4.7us time constant does decrease the le...   Aug 4 2009, 02:57
|- - andy_c   Here's another thing I noticed in his test app...   Aug 4 2009, 14:23
||- - Arnold B. Krueger   QUOTE (andy_c @ Aug 4 2009, 09:23) Here...   Aug 13 2009, 12:56
|- - Pio2001   Hello, I've just read the first and third arti...   Apr 18 2010, 23:07
|- - C.R.Helmrich   QUOTE (Pio2001 @ Apr 19 2010, 00:07) Ther...   Apr 18 2010, 23:56
|- - Arnold B. Krueger   QUOTE (Pio2001 @ Apr 18 2010, 18:07) QUOT...   Apr 19 2010, 14:49
- - ultrasonic   QUOTE (rpp3po @ Aug 3 2009, 02:42) QUOTE ...   Jan 2 2010, 05:09
|- - Woodinville   QUOTE (ultrasonic @ Jan 1 2010, 20:09) QU...   Jan 2 2010, 05:28
||- - ultrasonic   QUOTE (Woodinville @ Jan 2 2010, 06:28) Q...   Jan 2 2010, 05:41
||- - Arnold B. Krueger   QUOTE (ultrasonic @ Jan 1 2010, 23:41) QU...   Jan 2 2010, 06:15
|- - Arnold B. Krueger   QUOTE (ultrasonic @ Jan 1 2010, 23:09) QU...   Jan 2 2010, 06:01
|- - ultrasonic   QUOTE (Arnold B. Krueger @ Jan 2 2010, 07...   Jan 2 2010, 06:37
|- - Arnold B. Krueger   QUOTE (ultrasonic @ Jan 2 2010, 00:37) QU...   Jan 2 2010, 06:52
|- - Woodinville   QUOTE (ultrasonic @ Jan 1 2010, 21:37) Op...   Jan 2 2010, 10:29
||- - Arnold B. Krueger   QUOTE (Woodinville @ Jan 2 2010, 04:29) B...   Jan 2 2010, 13:24
|- - krabapple   QUOTE (ultrasonic @ Jan 2 2010, 00:37) Op...   Jan 3 2010, 06:43
- - Woodinville   It is interesting to note that now the same people...   Jun 15 2010, 19:31
- - Arnold B. Krueger   QUOTE (Woodinville @ Jun 15 2010, 14:31) ...   Jun 16 2010, 11:09
- - Paulhoff   QUOTE (Woodinville @ Jun 15 2010, 14:31) ...   Jun 16 2010, 12:33
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