Hi all
I did the same tests as mmortal3 and these are the results:
Scenario 1:- Tracks ripped to FLAC
- FLAC converted to ogg with oggdropXPd V.1.8.9 (non ITP version)
- Bit compare of the two ogg files (without converting to wav)
INFO (CORE) : startup time: 172 ms
INFO (foo_bitcompare) : Comparing:
INFO (foo_bitcompare) : location: "file://D:\Music\The Beatles - Sgt Peppers Lonely Hearts Club Band\flac_ogg_test01.ogg" (0)
INFO (foo_bitcompare) : location: "file://D:\Music\The Beatles - Sgt Peppers Lonely Hearts Club Band\flac_ogg_test02.ogg" (0)
INFO (foo_bitcompare) : No differences in decoded data found.
INFO (foo_bitcompare) : Finished successfully.
Scenario 2:- Tracks ripped to FLAC
- FLAC converted to ogg with oggdropXPd V.1.8.9 (non ITP version)
- ogg files converted to fixed-point wav files (44kHz, 16 bit) with Foobar2000
- Bit compare of the two resultant wav files
INFO (CORE) : startup time: 188 ms
INFO (foo_bitcompare) : Comparing:
INFO (foo_bitcompare) : location: "file://D:\The Beatles - Sgt Peppers Lonely Hearts Club Band\flac_ogg_test_fix_pt_01.wav" (0)
INFO (foo_bitcompare) : location: "file://D:\The Beatles - Sgt Peppers Lonely Hearts Club Band\flac_ogg_test_fix_pt_02.wav" (0)
INFO (foo_bitcompare) : first different sample found
INFO (foo_bitcompare) : differences found: 17645625 sample(s), starting at 4.535147e-005 second(s), peak: 5.602837e-006 at 57.83914 second(s), 2ch
INFO (foo_bitcompare) : Finished successfully.
Scenario 3:- Tracks ripped to FLAC
- FLAC files converted to ogg with oggdropXPd V.1.8.9 (non ITP version)
- ogg files converted to 32bit floating-point wav files with Foobar2000
- Bit compare of the two resultant wav files
INFO (CORE) : startup time: 188 ms
INFO (foo_bitcompare) : Comparing:
INFO (foo_bitcompare) : location: "file://D:\The Beatles - Sgt Peppers Lonely Hearts Club Band\flac_ogg_test_fl_pt_01.wav" (0)
INFO (foo_bitcompare) : location: "file://D:\The Beatles - Sgt Peppers Lonely Hearts Club Band\flac_ogg_test_fl_pt_02.wav" (0)
INFO (foo_bitcompare) : No differences in decoded data found.
INFO (foo_bitcompare) : Finished successfully.
As you can see, there were no problems on bit-comparison of the ogg files themselves. However, when the ogg files were converted to fixed-point wave files (44kHz, 16 bit) with Fb2k, bit-comparison of the two wave files revealed differences. However, there were no differences if the ogg files were converted to 32 bit floating-point wave files in Fb2k.
However, the strangest thing is what follows:
I converted the ogg files to 44kHz, 16 bit wave files using dBpowerAMP Music Converter. I assume these are fixed-point wave files. Bit-comparison of these wave files revealed no differences.
dBpowerAMP does not appear to have any floating-point wave mode but it can convert the ogg files to 44kHz, 24 bit wave files. I do not know if these are floating-point files. Can anybody clarify on this? Anyway, bit comparison of the 44kHz, 24 bit wave files showed no differences either.
So, only the 44kHz, 16 bit wave files converted with fb2k showed differences. The 44kHz, 16 bit wave files converted with dMC showed no differences. This is really puzzling, to say the least
I know I have not been too successful in helping here, rather the result seems to be more confusion!!
audiomars
edit: spelling