You are referring to VINYL, correct? This is from http://www.bands.co.nz/script/features/article.asp?body=17
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With vinyl the longer the sides are on the record, the quieter the record will be.

You can squeeze up to around 25 minutes on an LP at 33 1/3rpm, but it will be a quiet record compared to one with 15 minute sides.

Also tracks with lots of bass actually create wider grooves, so to cut a loud and bassy track you have to keep the side lengths down
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And to think I threw all my lps away YEARS ago!

Tracy

>>>How many tracks does a standard 33 1/3 LP have? (Assume 1/2 hour music on each side.)
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>>If by tracks we are talkng about songs then it's approximately ten, but I think (since it's in this forum) that perhaps the answer is only one?
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>>Renoir
>
>I see I should have asked about "channels" or "grooves". Actually, the answer is two - one on each side.