---
title: mRateScalar
framework: coreaudiotypes
role: symbol
role_heading: Instance Property
path: coreaudiotypes/audiotimestamp/mratescalar
---

# mRateScalar

The ratio of actual host ticks per sample frame to the nominal host ticks per sample frame.

## Declaration

```swift
var mRateScalar: Float64
```

## See Also

### Accessing the Data

- [mFlags](coreaudiotypes/audiotimestamp/mflags.md)
- [mHostTime](coreaudiotypes/audiotimestamp/mhosttime.md)
- [mReserved](coreaudiotypes/audiotimestamp/mreserved.md)
- [mSMPTETime](coreaudiotypes/audiotimestamp/msmptetime.md)
- [mSampleTime](coreaudiotypes/audiotimestamp/msampletime.md)
- [mWordClockTime](coreaudiotypes/audiotimestamp/mwordclocktime.md)