---
title: "write(to:smpteResolution:replaceExisting:)"
framework: avfaudio
role: symbol
role_heading: Instance Method
path: "avfaudio/avaudiosequencer/write(to:smpteresolution:replaceexisting:)"
---

# write(to:smpteResolution:replaceExisting:)

Creates and writes a MIDI file from the events in the sequence.

## Declaration

```swift
func write(to fileURL: URL, smpteResolution resolution: Int, replaceExisting replace: Bool) throws
```

## Parameters

- `fileURL`: The URL of the file you want to write to.
- `resolution`: The relationship between tick and quarter note for saving to a Standard MIDI File. Passing zero uses the default value set using the tempo track.
- `replace`: When true, the framework overwrites an existing file at fileURL. Otherwise, the call fails with a permission error if a file at the specified path exists.

## Discussion

Discussion The framework writes only MIDI events when writing to the MIDI file. MIDI files are normally beat-based, but can also have an SMPTE (or real-time, rather than beat time) representation. The relationship between tick and quarter note for saving to a Standard MIDI File is the current value for the tempo track.