Originally Posted by Brooko
Well done for actually doing the testing. Now compare this with your original quote - and you'll understand why ABX testing is a 'must'
According to your results from the abx - you were completely guessing the difference - ie you couldn't tell. Nothing to be worried about - the majority of us won't be able to either.
The best thing about this is that by knowing it, for your portable listening you can now use MP3 320 and save space on your DAP with complete confidence. For idevices, I recommend aac256 as it seems to be technically superior to mp3, and I cannot tell the difference (on well transcoded tracks) between lossless, 320mp3 and 256aac.
YMMV. To be sure - do your own transcodes of music you know well - and retest yourself at different bitrates. It's pretty enlightening.
yes i understood this for a while now if you check my other posts on sound quality and stuff on other threads. I do know that a properly encoded 320kbps mp3 sounds very very similar if not exact to the ALAC. i 100% found this out about a week ago when i was curious and did some testing. before that i knew but wasn't sure exactly what the difference is. Yes, I can tell that the two files are different. But they both sound "good" without any glaring audio deficienes. so it's very hard to tell which one is CD ripped into compressed lossless format and which one was an lossy format.
yeah i use itunes to encode them. like this thing, i have yet to really find any difference from using itunes to rip and encode as it does the job and has error checking. I use to just download music..320kbps..haha now those 320kbpsthat were downloaded from regular CD ripped ALAC converted to 320kbps myself..haha you can definatley tell a diff then...which is weird....as you then wonder how the heck the person that encoded did encode it? :/ it's easy to tell bad mastering apart from the audio codec usually. you should hear some 320kbps...it's hilarious. i would have believed if someone told me that used to be an 60kbps mp3
yes i do do my own encodes and i have done testing with stuff like this. I will probably be transfering the majority of my files to AAC 256kbps or 320kbps VBR MP3. But I will leave some files that you can tell apart form MP3(i have a couple) as ALAC and still retian the original files on my Macbook Pro..
256AAC/320kbps MP3 on ipod touch-->amp-->lod-->headphones
computer--alac---optical out--optical cable--DAC--pre amp-- driving amp--headphones
and yeah the difference from 320kbps sounding bad is not the file itself. it's how the person encoded it. this is just a statement for any lurkers reading. bad mastering is also an issue and for vinyls..you get way way more issues. mainly with ripping process
Edited by bowei006 - 2/16/12 at 3:04pm