Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Test your ears in my new ABX test
Test your ears in my new ABX test
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
View Poll Results: Have you been able to discern the files in an ABX test?
Yes, I was able to discern the files and have positive result 3 20.00%
No, I was not able to discern the files in an ABX test 12 80.00%
Voters: 15. You may not vote on this poll

Reply
 
Thread Tools Search this Thread
Old 1st November 2017, 07:00 PM   #11
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Test your ears in my new ABX test
Two runs, a 4/8 and 5/8. I'll maybe have another go tomorrow.
Attached Images
File Type: jpg Capture.JPG (78.1 KB, 284 views)
  Reply With Quote
Old 1st November 2017, 07:13 PM   #12
Mr Evil is offline Mr Evil  United Kingdom
diyAudio Member
 
Join Date: Aug 2004
Location: Behind you
9/16. Couldn't tell the difference.

Quote:
Originally Posted by Pano View Post
Thanks for these Pavel. But for some reason Foobar ABX is not working for me under Windows 10. Is it a known problem, or just me?
Foobar 1.3.16 and ABX Comparator plugin 2.0.4 (most recent versions of both) work in Windows 10 for me.
__________________
https://mrevil.asvachin.eu/
  Reply With Quote
Old 1st November 2017, 07:21 PM   #13
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Quote:
Originally Posted by Mooly View Post
Two runs, a 4/8 and 5/8. I'll maybe have another go tomorrow.
Thanks Karl. Though I know it is difficult to keep attention, more trials like 12 (16) might be statistically more relevant, or more runs with 8 trials. 8 trials would ask for 8/8 or at least 7/8 score to admit that the files were discerned.
  Reply With Quote
Old 1st November 2017, 07:22 PM   #14
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Quote:
Originally Posted by Mr Evil View Post
9/16. Couldn't tell the difference.

Thank you!
  Reply With Quote
Old 1st November 2017, 11:19 PM   #15
mimi123 is offline mimi123  Spain
diyAudio Member
 
Join Date: Oct 2010
Twice.
Thanks for your time in these investigations.
Attached Images
File Type: jpg ABX1.jpg (122.3 KB, 270 views)
File Type: jpg ABX2.jpg (180.2 KB, 268 views)
  Reply With Quote
Old 1st November 2017, 11:33 PM   #16
Max Headroom is offline Max Headroom  Australia
diyAudio Member
 
Max Headroom's Avatar
 
Join Date: Jan 2013
Location: West Australia, near to the beach, natural ambient sounds mostly.
I had a quick listen on $10 earbuds plugged into a laptop.
I was able to pretty reliably pick the differences.
I will try Foobar ABX on electrostatic headphones tonight.

Dan.
  Reply With Quote
Old 2nd November 2017, 06:57 AM   #17
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Quote:
Originally Posted by Max Headroom View Post
I had a quick listen on $10 earbuds plugged into a laptop.
I was able to pretty reliably pick the differences.
I will try Foobar ABX on electrostatic headphones tonight.

Dan.
Thank you for your input, Dan. Please take into account the fact that this time, only the valid ABX protocol is accepted as a proof that you (or anybody else) was able to hear the difference.
  Reply With Quote
Old 2nd November 2017, 06:58 AM   #18
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Let me say more about the test. There are two 44.1/16 files, on of them is original data from CD disc used in the test, the second file is recorded through this chain: Vincent CD-S3 player, 6m of coax SPDIF cable, DacMagic Plus D/A converter, power chip amplifier with OPA549, speakers Quadral Ascent 90, Roland Duo Capture Ex USB sound card for A/D recording. The two test files were matched in amplitude and time aligned at the beginning. The output for soundcard is taken from speaker terminals of the chip amplifier, the speakers are connected during the test. Voltage level is up to about 3Vrms at peaks. The chip amplifier has purely crossover distortion that lies 60 – 70dB below the signal magnitude (THD = 0.01% - 0.1% depending on magnitude and frequency). The crossover distortion has harmonics up to “infinity”, that means that both even and odd high order harmonics of distortion are present up to at least 200kHz at almost constant amplitude. I will show the spectral measurements later.

Attached is the test schematic.
Attached Images
File Type: png test_sch_549.png (31.0 KB, 252 views)
  Reply With Quote
Old 2nd November 2017, 07:37 AM   #19
Dave Zan is offline Dave Zan  Australia
diyAudio Member
 
Join Date: Nov 2010
Quote:
Originally Posted by PMA View Post
Let me be the first to show the test result, 7/12, close to coin flip...
Hi Pavel
You seem to have done a nice job, my compliments.
The "probability" number in the screen shot, however, looks seriously suspect.
I don't think this is your work, do you have any information on how it is calculated?

Best wishes
David
  Reply With Quote
Old 2nd November 2017, 08:07 AM   #20
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Hi David,

the "probability" number is calculated by the abx software and there is no way how to affect it. It depends on the order and number of successful and unsuccessful attempts during the test. However, I do not thing this is important, much more important is the number of successful attempts from the total number of attempts, IMO.
  Reply With Quote

Reply


Test your ears in my new ABX testHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Do you have Golden Ears? Take the test and find out maxw Everything Else 6 28th February 2014 02:19 PM
Ultimate listening test ... test your ears and audio chain PMA Everything Else 378 21st November 2013 10:20 AM
Jitter Test Signal (J-test Signal) with MATLAB merlijnv Digital Source 40 6th May 2013 04:36 AM
Test Signal for max power test of Class D? eem2am Class D 19 27th August 2012 09:22 AM
Is there any test cd to test jitter using a scope ? gaetan8888 Digital Source 4 10th August 2007 09:24 AM


New To Site? Need Help?

All times are GMT. The time now is 11:11 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki