# 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46 — File format magic numbers

For 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46, offset is 0; extension is aiff; format is Audio Interchange File Format, recorded from its source on 2026-08-03.

- **Hex signature:** 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46 _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0
- **Extension:** aiff
- **Format:** Audio Interchange File Format

## What the source says

> FORM ???? AIFF | 0 any | aiff aif aifc snd iff | <https://en.wikipedia.org/wiki/Audio_Interchange_File_Format> Audio Interchange File Format

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-08-03. Review by: 2027-08-03.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).