Do you 识别 the sounds?

It's a pool table

What was the drum-roll 声音 being used for?

Notice how the 作品 is 不 just 录音 of playing a game of pool from start to finish

The 作曲家 is using the different 声音 of playing pool to 创作 'gestures'

The 声音 are still 识别 as pool playing 声音 but are being 'abstracted' and 're-organised' to 创作 interesting new 声音 and combinations

Notice how the 声音 增加 in 强度 towards a climax

The 作曲家 has used a 混响 效果（效应） to 创作 a clear ending to this section

This new section has a very different feel about it

The 声音 have become less intense and quieter which changes the pace 动态 and the 整体 'feel' of the piece

聆听 where the 作曲家 has 加 a 延迟 效果（效应） 回声 to the coin slot sounds?

The pace is even slower now

Punctuated with sudden gestures

Another sudden 姿态 breaks through with a long 延迟 effect

What does the 临场 of voices suggest to you?

Slowly the 作品 comes to an end