cost and presumably quality of the equipment used. can the confident audiophile pick out the MP3?). Also, I would love to see if there's a significant bias for those who thought it was easy to tell the difference (ie. My hope is that there will be enough responses to statistically differentiate any bias towards A or B. Yup, no doubt there will be criticisms of the methodology. Even if you can detect a difference (likely to be pretty subtle), you are also tasked with figuring out which one is "better." He then might publish it, which will affect any listeners who don't use a DBT software.Įven if someone guesses wrongly, publishing that guess would introduce bias.ĪNother interesting quirk, compared to ABX, is that there's no reference. Quote from: Kohlrabi on 12:57:19 Someone might analyse the spectra of the files and look for MP3 signatures beforehand, or conduct a successful test, and thus be able to determine correctly that file "B" is the lossy one. Also, I have no ads and I care not about the # of hits, haven't even signed up for Google Analytics or anything like that.Īs of today, there are just >100 responses from around the world! There's about 1.5 weeks left so I would love to get more responses to beef up the stats analysis. You'll note that my blog has nothing on it other than this. Although I love audio gear, I know most of the world doesn't care for the bizarre/cultish/tweaky nature of much of it (frankly neither do I!). I know this place is "reasonable" but just the same, I am interested in an honest evaluation for anyone who hasn't already tried a blind test or just wants to be charitable in devoting some time and let me borrow the use of their ears/brain and equipment. You don't want to actually post at a reasonable place like HA, you're just trying to get hits on your blog. Quote from: testyou on 03:28:12 I'm going to decline your invitation Archimago.
320 kbps vs lossless full#
How will you be able to exclude guesses from your results, if you only have this single question at the beginning, and not a full test result with a number of trials that reduce your likelihood of the result occurring by chance to below 0.05? If the listener did not perform a full ABX test with a high enough number of trials, but rather a single listening or guess, this is the same as conducting only a single ABX test, where a person who guessed has a 50% chance to guess correctly. The questionnaire reduces the test to a single question about whether "A" or "B" is the inferior source. Similar to how the ABC/HR tests have been done here in the past. the test is done by enforcing the use of a DBT software, and ideally the result cannot be tampered with. To me, the only way to ensure a proper test is to ensure that no cheating is possible in the first place, i.e. He then might publish it, which will affect any listeners who don't use a DBT software. Someone might analyse the spectra of the files and look for MP3 signatures beforehand, or conduct a successful test, and thus be able to determine correctly that file "B" is the lossy one.
320 kbps vs lossless software#
Since you don't enforce the use of a software which ensures the test is being conducted in a double-blind fashion, so that the experimenter himself doesn't know which file is which until the test is finished, the following chain of events might occur: Reading the test description one flaw seems to be that you encoded one set with a lossless encoder (let's call it "A"), and the other with a lossy MP3 encoder ("B"). OOps - the title should have read 'ends Jan 31'.
320 kbps vs lossless download#
the same songs "Set B" one of which was MP3 encoded.Ĭome to my blog to download the music and fill out the survey: The "test" is relatively simple and consists of 3 musical passages encoded as "Set A" vs. There's 2 weeks left so if you've ever been curious about participating in a blind test or just want to add to the dataset, here's your chance :-). Folks have been using everything from inexpensive (but good) headphones to megabuck separates >$50K for this. So far, I have >70 responses from around the world with 5 continents represented. I'm only planning to collect data until the end of January 2013. Since early December 2012, I've opened up a survey to see if music lovers & "audiophiles" around the world can tell the difference between high bitrate ~320kbps MP3 against the original un-lossy-compressed CD audio. Nonetheless, I've been collecting data from around the audio forums since early Dec 2012. Happy New Year and greetings everyone! I know the folks here at Hydrogen audio have been around and back with regards to these tests.
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