Hydrogenaudio Forums > Issue with OmniEncoder using iTunes AAC

Full Version: Issue with OmniEncoder using iTunes AAC

Hydrogenaudio Forums > Lossy Audio Compression > AAC > AAC - General

cologne

Jun 23 2007, 02:11

I ripped 3 tracks off a CD using iTunes AAC, and then I decided to try out EAC w/OmniEncoder on the same 3 tracks to see if I would get the same results. I used Foobar2000's bit comparator to compare each version, and all three came up different! I have my EAC set up with AccurateRip, and I thought the cause might have been from AccurateRip. Has anybody else tried this with or without AccurateRip installed to say if the results will be the same?

CODE

Comparing:
"C:\Documents and Settings\XPS Gen 2\Desktop\The Paramour Sessions\01 ...To Be Loved.m4a"
"C:\Documents and Settings\XPS Gen 2\My Documents\My Music\m4a\Papa Roach\The Paramour Sessions\01 ...To Be Loved.m4a"
differences found: 16057992 sample(s), starting at 0.0000000 second(s), peak: 2.1560194 at 30.1567800 second(s), 1ch

Comparing:
"C:\Documents and Settings\XPS Gen 2\Desktop\The Paramour Sessions\02 Alive (N' Out Of Control).m4a"
"C:\Documents and Settings\XPS Gen 2\My Documents\My Music\m4a\Papa Roach\The Paramour Sessions\02 Alive (N' Out Of Control).m4a"
differences found: 17828159 sample(s), starting at 0.0000000 second(s), peak: 2.1283212 at 16.0966440 second(s), 2ch

Comparing:
"C:\Documents and Settings\XPS Gen 2\Desktop\The Paramour Sessions\03 Crash.m4a"
"C:\Documents and Settings\XPS Gen 2\My Documents\My Music\m4a\Papa Roach\The Paramour Sessions\03 Crash.m4a"
differences found: 17809928 sample(s), starting at 0.0000000 second(s), peak: 2.0425121 at 56.7772789 second(s), 2ch

Seiitsu

Jun 23 2007, 05:13

Possibly a difference in Nero AAC and iTunes AAC? Or a difference in how EAC rips and how iTunes rips since iTunes does in no way rip securely?

Personal speculations... not entirely sure myself exactly what the reason for the difference is.

cologne

Jun 23 2007, 11:32

Well, this was a brand new CD I had purchased yesterday. I didn't use Nero AAC to encode either file, they were both encoded in iTunes AAC at the same enocder setting. The difference is iTunes ripped it in the first scenario (straight to AAC), and EAC ripped it in the second scenario and OmniEncoder sent it to iTunes for encoding (WAV->AAC).

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