I tried an ABX with iTunes AAC 224 and my current V2.
at least to me, if I was able to tell the difference between one track, that's good enough for me but maybe not for others.
Comparing two lossy files demonstrates nothing of the sort and might just show that you prefer a particular type of distortion or other side-effect inherent to one of them.
If it turns our that only one of them has an audible artifact and the other is transparent then ABXing two lossy files would not have yielded a different result than ABXing each lossy against the lossless source independently.
Quote from: demosthene on 06 August, 2011, 05:27:36 PMI tried an ABX with iTunes AAC 224 and my current V2.That’s not how to ABX. Compare the (each) lossy file to its uncompressed source. The point is to evaluate how transparent a given lossy encoding is, to your ears. Comparing two lossy files demonstrates nothing of the sort and might just show that you prefer a particular type of distortion or other side-effect inherent to one of them.Quoteat least to me, if I was able to tell the difference between one track, that's good enough for me but maybe not for others.Even once the above were corrected for, it wouldn’t be enough. What if that single track were the only one of its kind? What if the rest of your tracks would be better encoded by the other format? You might say it’s not likely, but without an adequate sample, no one can draw any conclusions (and this applies to everything, not just audio).
Fair enough. When I did the test, it was more for myself to see if I preferred AAC 224 (what I used to use) over V2. Maybe that's not the way to ABX and I wish I had saved the log but I wasn't really planning to engage in discussions here to defend myself.
I'll probably try it again sometime but it was really so much effort. Even with one track, I would listen to different parts of it and then even if I compared a few seconds, I'd sometimes listen to it dozens of times for each trial of one ABX. Once I could tell a difference (sorry I'm not sure how noticeable that'd be in daily listening), it was good enough for me but yeah I realize perhaps not for real proof.
Yes, I am totaly agree with saratoga, i did a test and I preferred AAC224, here is a good guide to learn more