Before buying: songs playing at a slower speed?

SanDisk MP3 players Sansa® Fuze™
99

@niko_sama wrote:

I finally read everything.  Interesting subject.   

I’d be interested in knowing more about the timing source used in the fuze/clip.

Now I’d like to test my devices and see how they rate.

 

I found my wife’s Chromatic tuner again and you guys sparked my interest so I made a few new test files using Audacity and tested them. The results are shown below.

  1. 440 Hz sine wave at 44100 sample rate encoded with LAME MP3 - 20 cents slow

  2. 880 Hz sine wave at 44100 sample rate encoded with LAME MP3 - 20 cents slow

  3. 440 Hz sine wave at 48000 sample rate encoded with LAME MP3 - dead on

  4. 440 Hz sine wave at 22050 sample rate encoded with OGG         - dead on

  5. 440 Hz sine wave at 96000 sample rate encoded with OGG         - dead on

There seems to be a pattern here. Does anyone want to comment.

Note that the real time clock is about 5 minutes slow - but I set it about a month ago.

p.s. I can hear a clear difference in pitch between these files.

Message Edited by Mp3Geek on 02-15-2009 07:00 PM