The distance traveled is greater but the time for one revolution remains the same.
The same principle applies in audio cassettes where the tape travels at differing speeds at diffferent point on the tape (due to more or less tape on the winding reel) but it does not matter so long as this is the same at playback as it was during record. On a related note I saw a hexagonal record in a shop window the other day which had haxagonal grooves!! On Sat, 15 Aug 1998, Joshua M. Hill wrote: > i agree that the needle always travels at the same velocity, the record is > always turning at 33-1/3 rpms. > > but the circumference of a locked groove at two different positions on the > record will be different lengths. traveling the same velocity on each of > these grooves, one will be longer than the other. imagine a needle on the > outside edge, every revolution it will cover about 31 inches. on the inside > edge, it will cover about 12.5 inches per revolution. now if these are both > played at the same velocity, your going to have to find the correct place at > which a 133+1/3 rpm loop can be placed on the record. > > cheers. > > -- > Joshua Hill - [EMAIL PROTECTED] > icq: 3045997 / aolim: mandlebrot314 > www.ai-studio.com/josh - homepage > www.hillhaus.com - detroit cyberia > www.ai-studio.com - curator > -- > ----- Original Message ----- > From: "joe beuckman" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Cc: <313@hyperreal.org> > Sent: Saturday, July 15, 2000 2:30 PM > Subject: Re: [313] loops/lock grooves > > > > >on the outside, the record has a larger diameter. played at 33-1/3 rpms, > > >you > > >could play a locked groove with less bpm. on the inside, it is smaller > and > > >you could play more bpm. i mean, the difference in circumference is like > 19 > > >inches! (2pi5 - 2pi2). maybe i'm just wrong. > > > > a common misconception... > > this is like saying time passes more quickly on a large wall clock than on > a > > pocket watch. the rpm (angular velocity) of the turntable is independent > of > > the tone arm's position (radius.) > > > > mechanics! > > > > for philosophy, see jeff mills' rings of saturn. > > :) > > > > jb > > ________________________________________________________________________ > > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
