arnyk wrote: > Some references: > > http://www.mixonline.com/thewire/new-subjective-tests-challenge-claimed-benefits-high-resolution-audio/426946 > > https://www.youtube.com/watch?v=SQzNPAdF4aI >
The files that you can download to do your own listening tests can be downloaded (full set for 3 different tests) http://www.avsforum.com/uploads/Combined-HRA-Test-Files.zip There are three sets of files for performing 3 different subjective tests. The 3 tests cover (1) Dynamic Range Tests, (2) High-Frequency Tests Using Highpass Filter, and (3) High-Frequency Tests Using Lowpass Filter. The dynamic range test presents a 15 sec selection of music at a reference level that the listener chooses, 15 seconds of the same music further attenuated by an amount that is characteristic of the specific test, and another 15 second clip of the same musical selection at the same reference level as the first selection. The characteristic attenuations range from 0 dB to 90 dB in logical steps and are identified in the file name. One can use these files for ABX testing on their PC using the FUBAR2000 ABX Comparator plugin, which like the FOOBAR2000 music player is a free download. The "A" reference file for all dynamic range tests should be the -90 dB file. Ideally there would be a - infinity file (digital black) (which I have created for myself), but it is too large to upload. Select the "B" file from the list of dynamic range files with various attenuation. Usually one starts with the highest possible dynamic range and works down. If you can reliably hear a difference between one of these files and the reference "A" file, then you have shown that you can reliably hear a difference related to that amount of dynamic range. Obviously, you can play these files at very high potentially ear damaging levels and obtain very sensitive results, but the intent is that you first pick and maintain a comfortable listening level for the unattenuated segments of the test files. The reference "A" files for the frequency response tests should be the files that cover the fullest frequency ranges, such as the "030 kHz Chime 192 dB per Octave.wav" and the "030 1kHz to 40kHz Chime 192 db per Octave.wav" files. Again start with the "B" file with the highest possible frequency range and work down until you reliably hear differences. ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=105572 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
