In music, a cloud is a sound mass consisting of statistical clouds of hundreds or thousands of microsounds and characterized first by the set of elements used in the texture, secondly density, the number of events within a time period. Clouds may include ambiguity of rhythmic foreground and background or rhythmic hierarchy.
Examples include:
- Iannis Xenakis's Concret PH (1958), Bohor I (1962), Persepolis (1971), and many of his pieces for traditional instruments