bryston, and others not all mp3s are the same.
Mp3 is just a lossy file format. Those that buy then rip (I am one) can be certain of the quality. What is sold at
itunes and most other sites are fairly low quality. Anyone with a trained ear and does not need a earing aid can tell the difference between a 128 and real. There are sites that sell high quality mp3s or lossless. I gather bluecoast has such an organization. Both sound the same but lossless has much more data.
If you rip something other than new CDs and use a tool like accurip you will know the biggest problem with playing CDs is surface defects. Unless your CDs have close to perfect surfaces, there will be defects in the hearable range. Vinyl has to be much much worse. You must damage the disk slightly every time you play it. Washing the disk after each use and using light tracking will reduce the wear but can't eliminate it. Persons ripping CDs then listening to digital (hi-end mp3s or lossless) listen to higher quality music than persons that play vinyl and probably better than persons that play CDs. At best, the music of a played
CD will equal a hi-end digital tune.
A 320 constant bits per second faithfully
capture everything a perfect human ear can hear. Most adults with a trained ear can't make out much above a 190 BR. 320 is massive over kill. Most persons that buy and rip go over kill. I do, since that insures over-kill quality. If you can REALLY hear the difference between a 320 and 'real' the source of the
mp3 was not 'true'. If you burn a set of 128 BR to an audio disk then re-rip to mp3 or lossless the music is still 128. That does not happen to persons who buys a CD then rips it.
Anyone that thinks they can tell the difference between a
LAME extream mp3 and source can post a compliant on the
LAME forum. To be taken seriously, you will need an mp3 with a few seconds of the music with the defect, the matching wave source, the time and
frequency of the defect and a description of the defect. The forum members will check out your complaint. If it is valid I would suspect a company like
LAME would start working on the defect correction emmediatly. I have read the dialong during the testing/debugging of LAME's
VBR mp3 encoder. That was an eye opener!
LAME corrected all valid complaints. After reading that I can only chuckle when persons tell me they can hear the difference between what ever and a high end mp3 expertly created. I notice they are never specific about the differences. They indicate only a fool couldn't tell the difference.
One other point... I am expecting some flames after this post.
There are some vinyl disks that were 'pressed loud'. They will sound better than CDs. However, a audio capture of a pressed loud vinyl will sound the same if done properly. The high frequency tones or the pressed loud disks were amplified giving the music a richer sound. That has NOTHING to do with the fact that it is vinyl. You can do the same trick using an equalizer.
Note, I never said there is no place for lossless. I used lossless to preserve audio captures of vinyl. I just don't rip to lossless if I own the CD.