---
title: AVAudioConverterPrimeMethod.pre
framework: avfaudio
role: symbol
role_heading: Case
path: avfaudio/avaudioconverterprimemethod/pre
---

# AVAudioConverterPrimeMethod.pre

An option to prime with leading and trailing input frames.

## Declaration

```swift
case pre
```

## See Also

### Options

- [AVAudioConverterPrimeMethod.normal](avfaudio/avaudioconverterprimemethod/normal.md)
- [AVAudioConverterPrimeMethod.none](avfaudio/avaudioconverterprimemethod/none.md)