The reason I posted it (and the reason it's interesting IMO) is because most people got it "wrong".
How will that lead to bias? Will people start picking the one that sounds worse because they assume that is the 320kbps?
I plugged in a pair of ear buds into my laptop to do the test and it was imediately obviouse that Spoiler (click to show/hide) had horrible artefacts. so Spoiler (click to show/hide) was louder so that does fit in with the classic loudness A B test loudness bias concept.
Quote from: pdq on 23 February, 2012, 12:29:50 PMHow will that lead to bias? Will people start picking the one that sounds worse because they assume that is the 320kbps?That is a very plausible placebo effect.
Spoiler (click to show/hide)
A test given to new students by Stanford University Music Professor Jonathan Berger showed that student preference for MP3 quality music has risen each year. Berger said the students seem to prefer Spoiler (click to show/hide)
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Lastly–I have spent hundreds of hours doing tests with HD music and conversion formats and I have noticed something amazing [!!!] I have been able to make a wave file smaller than an mp3 at 128kbs by changing the codec to mpeg layer 3 and 16 bits 44htz stereo and sound identical to the original wave file. Some of the music files were only 3 megabites. Try to do that with an mp3 recorder!"
Well, I picked the 320 Sample, but I was listening with headphones, and I've had a lot of experience being a critical listener to audio compressors. That being said, they're both probably pleasant enough to listen to for a typical pop/rock type of track on YouTube, etc.However neither sounded top-notch, compression aside. It sounded like one big blur, either way. I think if it had been a more "crisp" recording, more people would have got it right.Most of my listening / recording is with solo piano music, and I've become very good about telling what's going on with any recording I hear, from compression to type of piano, to microphone type and placement. With other types of music, I'm not as good.