Which bob dylan song destroyed all previous restrictions on a pop single, including length, subject matter, and poetic diction?

"Like a Rolling Stone". It was a breakthrough because it was made in a rock music format in which musician Al Kooper improvised the organ riff that is known in the track. The length at over six minutes and it features a heavy electric sound, thus it destroyed all previous restrictions on a pop single, including length, subject matter, and poetic diction.

Monophony monophony means music with a single "part" and a "part" typically means a single vocal melody, but it could mean a single melody on an instrument of one kind or another.( just a short note ) : )hope it

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.