The file
http://www.iua.upf.edu/mtg/ismir2004/contest/rhythmContest/TrainingDataURLs.txt
contains the necessary links to download from the internet the training data
for the rhythm classification contest.
There is a total of 488 instances
distributed in 8 folders, each folder
corresponding to a rhythm class.

The distribution is as follows:
-ChaChaCha 78
-Jive 42
-Quickstep 57
-Rumba 69
-Samba 60
-SlowWaltz 77
-Tango 60
-VienneseWaltz 45

The files are in RealAudio format, the way to decompress them
is up to each participant. Windows users might use e.g.
the free evaluation copy of Wisecroft Ripper (www.wisecroft.com).

The file 
http://www.iua.upf.edu/mtg/ismir2004/contest/rhythmContest/AlgorithmOutput.txt 
is an example of what should be the
output of participants' classification
algorithms.
The format is as follows:

'name of the audio file' 'class'\n

where 'class' takes values between 1 and 8
1 --> ChaChaCha
2 --> Jive
3 --> Quickstep
4 --> Rumba
5 --> Samba
6 --> SlowWaltz
7 --> Tango
8 --> VienneseWaltz