I currently have two : the HFNRR and the Micro Acoustics Test Record. The only Test LP I've used more than once over the years is the HFNRR. Generally it's handy for initial setup e.g. checking that I don't have the L-R channels accidentally wired in reverse, arm/cartridge resonances are within the expected range etc. If you are feeling wild you might even, at some point, sample the 12db tracking test band to see how the items behave together.
After that it can be safely consigned to the cupboard for a few years.
Under no circumstances would I base my bias setup on those tracking tests or consider my cart a complete failure because of them. Music (at all levels) is the best reference for adjustment.
Having said all this the Test Record is still a handy thing to have. Just another tool to add to the set. In reality you could get by without it.
As for oscilloscopes, the same applies to them too :)
After that it can be safely consigned to the cupboard for a few years.
Under no circumstances would I base my bias setup on those tracking tests or consider my cart a complete failure because of them. Music (at all levels) is the best reference for adjustment.
Having said all this the Test Record is still a handy thing to have. Just another tool to add to the set. In reality you could get by without it.
As for oscilloscopes, the same applies to them too :)