---
title: windowDurationConstraint
framework: soundanalysis
role: symbol
role_heading: Instance Property
path: soundanalysis/snclassifysoundrequest/windowdurationconstraint-5no60
---

# windowDurationConstraint

A range or list of sound duration times the request’s underlying sound classifier supports.

## Declaration

```swift
@nonobjc var windowDurationConstraint: SNTimeDurationConstraint { get }
```

## Discussion

Discussion Configure the request’s windowDuration property with a value that satisfies the window duration constraint.