---
title: Frequency Response Constants
framework: audiotoolbox
role: collectionGroup
role_heading: API Collection
path: audiotoolbox/1534092-frequency_response_constants
---

# Frequency Response Constants

The maximum number of frequency response bin structures for the AudioUnitProperty_FrequencyResponse property.

## Topics

### Constants

- [kNumberOfResponseFrequencies](audiotoolbox/knumberofresponsefrequencies.md)

## See Also

### Equalizers

- [Parametric EQ Unit Parameters](audiotoolbox/1389950-parametric_eq_unit_parameters.md)
- [Audio Unit Graphic EQ Parameter ID](audiotoolbox/1389932-audio-unit-graphic-eq-parameter.md)
- [Peak Limiter Unit Parameters](audiotoolbox/1389597-peak_limiter_unit_parameters.md)
- [Dynamics Processor Unit Parameters](audiotoolbox/1389787-dynamics_processor_unit_paramete.md)
- [AUSpatializationAlgorithm](audiotoolbox/auspatializationalgorithm.md)