I found this cartoon on my Giant 600 Cartoon Collection under the name "Music Academy". It's a BBC production based off the works of one Gerard Hoffnung. Like so many cartoons of the eras preceding it, it's a plot less little thing with many mild visual gags and puns, mostly music related; a wide variety of instruments can be heard. There's fishing with violins in a piano, playing a bicycle wheel (in perfect tune), piano fighting (just like bull fighting), etc. It's a late example of this type of cartoon, but it fits in neatly with many others you'll find in any miscellaneous collection of public domain cartoons. I wouldn't seek it out, but I wouldn't skip it if you're watching cartoons and it comes up.