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# CMDoesBigEndianSoundDescriptionRequireLegacyCBRSampleTableLayout(_:flavor:)

Returns a Boolean value that indicates whether the sample tables need to use the legacy constant bit-rate encoding layout.

```
func CMDoesBigEndianSoundDescriptionRequireLegacyCBRSampleTableLayout(_ soundDescriptionBlockBuffer: CMBlockBuffer, flavor: CMSoundDescriptionFlavor?) -> Bool
```

## Parameters

`soundDescriptionBlockBuffer`

`CMBlockBuffer` containing SoundDescription data structure in big-endian byte ordering.

`flavor`

`kCMSoundDescriptionFlavor` constant or `NULL` for QuickTimeMovie flavor.

## Discussion

---

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