http://img108.imageshack.us/img108/8...ysisallsj0.png
My ears agree with the above results -
1: No difference
2: No difference
3: No difference
Although there *are* differences between each of the sample pairs, this can be attributed to
- The samples were MP3 compressed, and some MP3 compression artifacts can be heard
- The recording process. I'm assuming you just connected the player's output to the input of the computer's sound card (which model? integrated or separate?); most common computer sound cards don't have a very high S/N ratio so the result has some noise introduced.
- Other noise sources in the environment (your monitor, printer, scanner, cell phone, television, etc.)
Try recording the
same sample multiple times and compare the resulting (uncompressed) files in a sound editor after aligning them; you'll find they do differ by what looks like a significant amount. Now if someone else did the same, and told you one set was recorded after freezing the player/holding it upside-down for 24 hours/sleeping with it/etc. you might believe that was what caused the difference!