@cto517 On a thread like this I am looking to learn. FWIW - I find the available online documentation for RIAA inconsistent, confusing, misleading, incorrect data .. no wonder, imo, it is difficult to grasp when we have experts like yourself contradicting words and terms we have read online..... trying to fill in the blanks. A definition of terms for important Words would help to fill in some blanks. Like for example - Constant Velocity, Constant Amplitude
Thanks for your suggestion. You are correct there are many terms being used incorrectly, Here is a list of proper terms. It is most important to use the correct terms and language.
Constant Amplitude is what a wave generator puts out, ususlly as a sine wave. The part that is constant and most important is that it does this at constant voltage (+/- by 0.5 db, or better). In Physics it means to move the same distance over all frequencies. If we recorded a record with constant amplitude the wiggle width of the grove would be constant.
Constant velocity is a bit more difficult. We tend to drive at constant velocity (speed) on the freeway. However there are few things in audio that are constant velocity.
Velocity cartridge produces a voltage proportional to its cantilever speed (velocity). Therefore to produce the the same voltage it has to go much farther in the same time. Therefore the bass grove space get wider.
Amplitude cartridge produces voltage proportional to its cantilever offset or distance without regard to velocity.
Thats a start. Can you name a few more you would like to have defined?