Sample M4A File — AAC in MP4 Container

Download a free M4A file (AAC audio in MP4 container). M4A is the format used by iPhone voice memos, iTunes purchases, and Apple Music downloads. Test M4A detection and playback in your app.

sample.m4a

3.00 MB

120s · 128kbps · 44100Hz · stereo

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File details and verification

Filename: sample.m4a
Exact size: 3,145,728 bytes
Displayed size: 3.00 MB
Catalog status: Valid catalog fixture
SHA-256: be72432f89f7cab718ae6a31b23497d1f9915f909b972d2793e5fcef3b2216be
Header signature: Matched (ISO BMFF ftyp box at byte 0 (brand M4A))
Verified on: 2026-08-10
MIME type: application/octet-stream
Duration: 2m
Bitrate: 128 kbps
Sample rate: 44,100 Hz
Channels: stereo
License: CC0 / Public Domain
Download URL: https://cdn.truefilesize.com/aac/sample.m4a

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Other AAC files

sample-1mb.aac

1 MB

60s · 128kbps · 44100Hz · stereo

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File details and verification

Filename: sample-1mb.aac
Exact size: 1,048,576 bytes
Displayed size: 1 MB
Catalog status: Valid catalog fixture
SHA-256: 427803cea1035621764976121b7d7b46b66ecf334092cbde5ec2ae588b1f55a8
Header signature: Matched (AAC ADTS)
Verified on: 2026-08-10
MIME type: application/octet-stream
Duration: 1m
Bitrate: 128 kbps
Sample rate: 44,100 Hz
Channels: stereo
License: CC0 / Public Domain
Download URL: https://cdn.truefilesize.com/aac/sample-1mb.aac

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sample-5mb.aac

5 MB

300s · 128kbps · 44100Hz · stereo

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File details and verification

Filename: sample-5mb.aac
Exact size: 5,242,880 bytes
Displayed size: 5 MB
Catalog status: Valid catalog fixture
SHA-256: 11757698e89a40940dc3abbd8afbfb0ccdd8b961cf1a5da9a382cac0b654f459
Header signature: Matched (AAC ADTS)
Verified on: 2026-08-10
MIME type: application/octet-stream
Duration: 5m
Bitrate: 128 kbps
Sample rate: 44,100 Hz
Channels: stereo
License: CC0 / Public Domain
Download URL: https://cdn.truefilesize.com/aac/sample-5mb.aac

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Frequently Asked Questions

What is the difference between AAC and M4A?

AAC is the audio codec. M4A is a file container (MP4/MPEG-4) that wraps AAC audio. M4A = AAC codec + MP4 container. Similar to how MP3 is both a codec and container, but M4A separates them.

Can I rename .m4a to .mp4?

Technically yes — M4A is just MP4 without video. But most apps expect .m4a for audio-only files. The MIME type is audio/mp4 for M4A vs video/mp4 for MP4 video.