![]() It's the loud passages at the inner groove that cause tracking problems. Only the quiet passages are mostly exempt, as the groove pitch will be very mild. Yes! pinch effect is a fact of life on all 33 RPM records at the inner groove. The reason 45 RPM sounds better is because it is better! You mentioned pinch effect in your original post. Thanks for reading, hope this helps, pls ask if confused. A 45 RPM can be cut just as hot as 331/3, and will have a lower groove pitch, easier to track, and will produce less distortion and LESS surface noise. The 45 RPM records have inherently lower pitch. If a 33 1/3 RPM record is cut hot, the Shibata should still track it without any problem. However this increase will never eliminate it. ![]() Sometimes an increase in tracking force can reduce the distortion produced from pinch effect. The Shibata is not forced upward, therefore tracks the narrowed portions of the groove effortlessly, and without distortion artifacts.īack to the conical and elliptical. The line contact or Shibata stylus is shaped very closely to the cutting stylus. The outer groove of lowest groove pitch does not produce pinch effect. The pinch effect, again, is the physical upward movement of the stylus, and an inner groove problem. A conical or elliptical can be tracking perfectly, the forced upward motion (not part of the music) will always produce distortion. The stylus, being not shaped like a cutting stylus is forced upward at the narrow parts of the groove (narrow between the groove peaks) The upward motion of the stylus is NOT a part of the signal, therefore produces audible distortion. The stylus is "pinched" by narrowing of the groove, exactly as it was cut. Pinch effect is more of a problem with the conical stylus and ellipticals. Most of it is the physical phenomenon, "pinch effect", always worsened by a sharply pitched groove. ![]() That cartridge performed flawlessly in the EMT arm and table he eventually purchased.Ĭlick to expand.The reason 45 RPM sounds better is because it is better! You mentioned pinch effect in your original post. ![]() I suspect that the large amount of vibrational energy that this type of MC cartridge feeds into the tonearm was too much for the cheap arm and its loose bearings to handle. This cartridge has a micro-ridge type of stylus profile, so it should have easily handled the pinch of inner grooves. I heard inner groove distortion on some 33.33 rpm records and 45 rpm records too. The only time I have ever heard inner groove distortion on a well set up table (I did the set up) involved a new Ortofon Winfield cartridge that was temporarily installed on the cheapest Project table (a friend that was just getting into vinyl bought the cheap table while he looked for a more permanent alternative). But, the problem could be in any number of other areas, such as damage to your cartridge or incompatibility of the particular arm-cartridge combination. Most likely, the cartridge is not well aligned or some other parameter, such as tracking force, is not ideal. If you are experiencing problems on a number of records, there is a problem somewhere in your setup. I don't think it is a matter of a lot of 33.33 rpm records being cut so close to the point of creating problems with tracking while 45 rpm records avoid such problems because of less pinching in the inner grooves. I never have problems with any kind of mis-tracking, certainly not inner groove distortion, except in the case of used records that have been damaged by the previous owner(s). The chosen level is a matter of finding the right compromise. If a record is cut at a lower level, noise from ticks and pops will be higher in level relative to the signal.
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