---
title: AudioUnitParameterUnit.absoluteCents
framework: audiotoolbox
role: symbol
role_heading: Case
path: audiotoolbox/audiounitparameterunit/absolutecents
---

# AudioUnitParameterUnit.absoluteCents

An absolute unit of measure for the musical pitch of a note.

## Declaration

```swift
case absoluteCents
```

## Discussion

Discussion Absolute musical pitch in cents. 1,200 cents are equal to one octave. If f is a frequency in hertz, then absoluteCents = 1200 * log2 (f/440) + 6900. See also the AudioUnitParameterUnit.cents property.

## See Also

### Enumeration Cases

- [AudioUnitParameterUnit.BPM](audiotoolbox/audiounitparameterunit/bpm.md)
- [AudioUnitParameterUnit.beats](audiotoolbox/audiounitparameterunit/beats.md)
- [AudioUnitParameterUnit.boolean](audiotoolbox/audiounitparameterunit/boolean.md)
- [AudioUnitParameterUnit.cents](audiotoolbox/audiounitparameterunit/cents.md)
- [AudioUnitParameterUnit.customUnit](audiotoolbox/audiounitparameterunit/customunit.md)
- [AudioUnitParameterUnit.decibels](audiotoolbox/audiounitparameterunit/decibels.md)
- [AudioUnitParameterUnit.degrees](audiotoolbox/audiounitparameterunit/degrees.md)
- [AudioUnitParameterUnit.equalPowerCrossfade](audiotoolbox/audiounitparameterunit/equalpowercrossfade.md)
- [AudioUnitParameterUnit.generic](audiotoolbox/audiounitparameterunit/generic.md)
- [AudioUnitParameterUnit.hertz](audiotoolbox/audiounitparameterunit/hertz.md)
- [AudioUnitParameterUnit.indexed](audiotoolbox/audiounitparameterunit/indexed.md)
- [AudioUnitParameterUnit.linearGain](audiotoolbox/audiounitparameterunit/lineargain.md)
- [AudioUnitParameterUnit.midiController](audiotoolbox/audiounitparameterunit/midicontroller.md)
- [AudioUnitParameterUnit.midiNoteNumber](audiotoolbox/audiounitparameterunit/midinotenumber.md)
- [AudioUnitParameterUnit.meters](audiotoolbox/audiounitparameterunit/meters.md)