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 # sound:compute sharpness over time

 Last update: 31.07.2026 

**Version: 0.0.0**

## Description

Compute the sharpness over time of a signal, where sharpness is defined in accordance with Zwicker and Fastl's formula (E. Zwicker and H. Fastl, 'Psychoacoustics: Facts and Models', Springer-Verlag, 1999).

## Inputs

InputNameExpected type(s)Description**Pin 0**   
Requiredinput\_signal[`field`](../../core-concepts/dpf-types.md#field)Input signal in Pa on which to compute sharpness over time.**Pin 1**field\_type[`string`](../../core-concepts/dpf-types.md#standard-types)Field type associated with the recording conditions  
  
Supported values:  
  
\* Free  
\* Diffuse  
  
Default: Free## Outputs

OutputNameExpected type(s)Description**Pin 0**max\_sharpness[`double`](../../core-concepts/dpf-types.md#standard-types)Maximum sharpness value over time, in acum.**Pin 1**sharpness\_over\_time[`field`](../../core-concepts/dpf-types.md#field)Sharpness over time, in acum.## Configurations

NameExpected type(s)Default valueDescription**mutex**[`bool`](../../core-concepts/dpf-types.md#standard-types)falseIf this option is set to true, the shared memory is prevented from being simultaneously accessed by multiple threads.## Scripting

**Category**: sound

**Plugin**: sound

**Scripting name**: None

**Full name**: None

**Internal name**: compute\_sharpness\_over\_time

**License**: avrxp\_snd\_level1

## Changelog

- Version 0.0.0: Initial release.