Many music fans believe the quality of music is in decline, citing increasing homogeneity (less variety in sounds), simplicity, and commercialism. However, this perception is complex and debated, with other experts arguing that music's evolution is simply a reflection of changing technology, industr...y trends, and listening habits.

A prominent 2012 study by the Spanish National Research Council analyzed 500,000 songs released between 1955 and 2010 to examine objective musical traits over time. The findings showed a measurable decline in key areas

Timbral variety and harmonic complexity in popular music have declined, with modern music showing less diversity in instrumentation and fewer melodic variations. These changes are attributed to factors like the use of electronic instruments, compression to increase loudness, and a music industry focus on formulaic, mass-produced songs that prioritize marketability over artistic experimentation

Here's a link to the sttudy: http +