Older recordings pre-dating the early 80's are almost certainly pure analog.
Otherwise, you will find more and more digital in later years. Today I would suspect most everything is digital unless analog processing is clearly identified otherwise.
I the early 80's, digital was novel and recordings advertised that as a selling point.
Today, digital is the norm and analog novel so I would expect those using analog gear would want to make it clearly known to buyers who are looking for that.
Otherwise, you will find more and more digital in later years. Today I would suspect most everything is digital unless analog processing is clearly identified otherwise.
I the early 80's, digital was novel and recordings advertised that as a selling point.
Today, digital is the norm and analog novel so I would expect those using analog gear would want to make it clearly known to buyers who are looking for that.