I am a bit confused now about mono LPs. I started looking through my collections and try to determine which is mono and I am having a bit of a problem. I understand that pretty much anything before 1958 will be mono. The problematic period is 1958-196? I understand that usually there should be a code or something on the LP/jacket stating mono or stereo.
I suppose listening to it, I should be able to tell but I think I am having some difficulties especially with piano recording. Does not seem very obvious sometimes.
Also somewhere I read that if it is a mono reissue after 1960's, ie recent reissue of Glen Gould Goldberg variation (1955 mono version), I should not use mono cartridge as it is now cut for stereo cartridge. Is that correct?
Reading about how mono cartridge may damage groove of stereo LP makes me a bit wary about trial and error using both my stereo and mono cartridge.
Thanks for your help.
I suppose listening to it, I should be able to tell but I think I am having some difficulties especially with piano recording. Does not seem very obvious sometimes.
Also somewhere I read that if it is a mono reissue after 1960's, ie recent reissue of Glen Gould Goldberg variation (1955 mono version), I should not use mono cartridge as it is now cut for stereo cartridge. Is that correct?
Reading about how mono cartridge may damage groove of stereo LP makes me a bit wary about trial and error using both my stereo and mono cartridge.
Thanks for your help.

