How did the Song-Features change over time?

Songs are getting shorter and shorter

Shown here is the average song duration per year. Beginning in 1970 with 216 seconds the song duration increased until the peak of 275 seconds in 1990. From here onwards the average song length started to decrease again until today. In 2019 the average duration dropped below 200 seconds for the first time ever, in the observed period. This phenomenon could be possible because of the change of media. In the 70s music was mostly sold on vinyls. A media with only scarce amount of playback time. With the introduction of the CD, limited playback time was less of an issue, songs became longer. In the last decade, streaming services like Spotify, Apple Music and more have gained popularity and are for most people the primary way of music consumption. For some services artists are payed based on clicks rather than play time, this lead to the creation of shorter songs to maximize clicks, which explains the recent drop in the average song duration. Another factor is production costs, as recording long audios in past was expensive. But with the introduction of digital tools, this cost could be cut down.

Duration

The sound of silence sadness.

Based on the average values of the valence over the years, it is clear that the valence is decreasing. The value of valence describes the emotions of the songs, more about this can be read here. The phenomenon can be explained by the fact that music is not only used for celebrations or happy moments, but above all to process emotions at home in peace.

Info about Valence

I'll dance, dance, dance -
With my hands, hands, hands

The average danceability started to rise in 1970, with slight plateau in the 90s. In recent years the danceability clearly starts to rise again.
This could be attributed to several factors. One of the main reasons could be that the music industry and artists are increasingly focused on producing music that is suitable for clubs and dance events. This can lead to the rhythm, instrumentation, and arrangements of songs being designed for higher danceability.
Popular music in general has shifted away from rock music to more catchy pop tunes, which could have an impact on this recent raise of danceability. Furthermore, changes in culture and society may also play a role. Particularly in recent decades, pop music has increasingly focused on the needs and preferences of younger generations who are often looking for music that will make them dance and party. This can result in overall increases in danceability values in music.
Finally, the way danceability is measured in music may also play a role. Danceability is typically calculated based on tempo, rhythm, and beat patterns. If the calculation methods are improved or refined over time, this can lead to higher danceability values in music overall. And afterall danceability is highly subjective.

Info about Danceability

The Acoustic Renaissance: How music is returning to its natural roots

Recently, however, there seems to be a trend that acousticness in music is on the rise again. This could be due to several factors, including a growing appreciation for more traditional instruments and musical styles, as well as an increasing demand for live performances and acoustic events. In addition, the return to acoustic instruments may also be a reaction to the overproduction and overcomplexity of modern music. Many artists and listeners long for a return to simpler, more natural sounds and less artificial noises.

Info about acousticness

From Pumped to Plodding: The ebbing energy levels of Today's Top Hits

There are various factors that could explain the decrease in energy levels in music since 2010. In the years leading up to 2010, the music industry was heavily influenced by Electronic Dance Music (EDM), which is characterized by fast, bass-heavy beats and repetitive melodies. This could have contributed to an increase in energy levels in music. However, after 2010, the focus in the music industry shifted and there was a slowdown in beats and a departure from EDM. Another important factor is the rise of streaming services such as Spotify, which dominate the music market and are often listened to by users in different environments and contexts. To ensure that the music sounds good in every environment, many songs are produced with high levels of compression to ensure consistent volume levels. This can reduce the dynamics and energy levels of the music.

Info about Energy

One word says more than a thousand pictures

In recent decades, the music industry has shown a clear trend towards higher speechiness in songs. This can be explained by various factors, such as the influence of hip-hop and rap on popular music or the increasing importance of streaming services like Spotify. In addition, the way music is listened to has also changed, and many people prefer songs that have a clear and distinct vocal performance. Finally, there are also technological developments that make it easier for music producers to increase the speechiness in their recordings, for example by using Auto-Tune software or special microphones and recording techniques. All these factors together lead to a permanent increase of Speechiness in music.

Info about Speechiness

To discover the different features for yourself, you can find their descriptions under Data/Song-Features