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 # sound:compute octave levels from PSD

 Last update: 31.07.2026 

**Version: 0.0.0**

## Description

Compute octave-band levels from a power spectral density (PSD) input. Ten bands are considered whose center frequencies range between 31.5 Hz and 16000 Hz

## Inputs

InputNameExpected type(s)Description**Pin 0**   
Requiredpsd[`field`](../../core-concepts/dpf-types.md#field)Input power spectral density (PSD) for the levels' computation, in ^2/Hz.## Outputs

OutputNameExpected type(s)Description**Pin 0**levels[`field`](../../core-concepts/dpf-types.md#field)Octave-band levels. The returned level unit is derived from the input PSD's unit (for example, if the PSD is in Pa^2/Hz, the levels will be returned in Pa^2).The field support contains the octave-band center frequencies.## 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\_octave\_levels\_from\_psd

**License**: avrxp\_snd\_level1

## Changelog

- Version 0.0.0: Initial release.