Where did the phrase "the older the violin, the sweeter the music" originate?

I don't know if the saying can be properly attributed, but it does tend to be true. As the wood in a string instrument ages, it dries out and becomes more resonant. Assuming that it has been well cared for over the ages, older instruments do tend to have a deeper and more complex tone. However, some slight problems do present themselves in playing such instruments in a modern setting. Our tuning system has evolved a bit over the past few centuries...our A=440 is different (sharper I belive) than the A that Mozart would have heard. Also, now that we use metal strings that put a greater tension on the neck and body, vintage instruments frequently need some modifications to be of any use today.

Where did the phrase "the older the violin, the sweeter the music" originate?binoculars

I never heard it but I like that!!

Where did the phrase "the older the violin, the sweeter the music" originate?violin opera theater

I think this refers to the famed Stradivarius violins.