An hour of MP3's use how many Megabytes?

Hi dude60,

Music per megabyte
http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/home/portables_digitalplayers.html

"So how much music can a given player store? The basic rule of thumb
is "one megabyte holds one minute"; that is, for every megabyte of
memory, you can store about a minute of compressed music at near-CD
quality. So, a player that comes with 64 MB of storage can hold about
an hour of music.

Some folks store more music per megabyte by encoding their music at a
lower bitrate. Although certain codecs claim better sound quality at
lower bitrates, generally the more compression you use, the lower the
sound quality. Consider encoding files at lower bitrates for
applications such as audio books, where sound quality is less
critical."

Best regards,
tlspiegel

It depends upnt the encoding of mp3 
like if u have a song encoded in 64 bit will occupy less space than
the song encoded in 128 bit