---
title: kAudioFileStreamProperty_PacketSizeUpperBound
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kaudiofilestreamproperty_packetsizeupperbound
---

# kAudioFileStreamProperty_PacketSizeUpperBound

A UInt32 value indicating the theoretical maximum packet size in the streamed file. This value is useful for determining minimum buffer sizes, for example.

## Declaration

```swift
var kAudioFileStreamProperty_PacketSizeUpperBound: AudioFileStreamPropertyID { get }
```

## See Also

### Constants

- [kAudioFileStreamProperty_ReadyToProducePackets](audiotoolbox/kaudiofilestreamproperty_readytoproducepackets.md)
- [kAudioFileStreamProperty_FileFormat](audiotoolbox/kaudiofilestreamproperty_fileformat.md)
- [kAudioFileStreamProperty_DataFormat](audiotoolbox/kaudiofilestreamproperty_dataformat.md)
- [kAudioFileStreamProperty_FormatList](audiotoolbox/kaudiofilestreamproperty_formatlist.md)
- [kAudioFileStreamProperty_MagicCookieData](audiotoolbox/kaudiofilestreamproperty_magiccookiedata.md)
- [kAudioFileStreamProperty_AudioDataByteCount](audiotoolbox/kaudiofilestreamproperty_audiodatabytecount.md)
- [kAudioFileStreamProperty_AudioDataPacketCount](audiotoolbox/kaudiofilestreamproperty_audiodatapacketcount.md)
- [kAudioFileStreamProperty_MaximumPacketSize](audiotoolbox/kaudiofilestreamproperty_maximumpacketsize.md)
- [kAudioFileStreamProperty_DataOffset](audiotoolbox/kaudiofilestreamproperty_dataoffset.md)
- [kAudioFileStreamProperty_ChannelLayout](audiotoolbox/kaudiofilestreamproperty_channellayout.md)
- [kAudioFileStreamProperty_PacketToFrame](audiotoolbox/kaudiofilestreamproperty_packettoframe.md)
- [kAudioFileStreamProperty_FrameToPacket](audiotoolbox/kaudiofilestreamproperty_frametopacket.md)
- [kAudioFileStreamProperty_PacketToByte](audiotoolbox/kaudiofilestreamproperty_packettobyte.md)
- [kAudioFileStreamProperty_ByteToPacket](audiotoolbox/kaudiofilestreamproperty_bytetopacket.md)
- [kAudioFileStreamProperty_PacketTableInfo](audiotoolbox/kaudiofilestreamproperty_packettableinfo.md)